For the longest time, I had not encountered a concept of "self-care" but then I started seeing that term pop up around the internet and it seemed quite obvious that it was an important thing. That might seem silly, but if your timeline for these things reaches back to the '90s, like mine does, a notion like self-care is relatively recent on the historical timeline as a familiar concept.
I've also seen this in writing, with how you handle plot and character development. Or even some things that are silly but obvious like the fact that you can just go out and go on hikes if you want, and there are tons and tons of places to do that.
I feel like there's all kinds of hidden mental blocks that you can go your whole life not knowing that you have, and I appreciate this idea of elevating the concept to its own genre and targeting it with articles such as the one posted here.
I'm a bit of a DIY obsessive, so maybe I'm just all the way on the other side of the spectrum, but I don't hire someone to do something unless I feel the task is so far outside of my comfort zone that it poses a danger to me. I usually only do it after I've tried the task myself and utterly failed. You'd be surprised what you can do yourself with just a few YouTube tutorials and a decent collection of tools. As a side effect, I've gotten pretty good at being handy around the house, managing the family's finances, repairing our cars, doing major home improvement projects including building barns and sheds, building furniture, lawn care, tree trimming, electrical, plumbing, etc. I consider developing these skills a better investment than the alternative which is perpetually needing to pay someone to do them.
And all it costs is my time, which is free.
Well my time is definitely not free; people pay lots of money for access to it.
The problem with "muh welcome to upper middle class prosperity" lists like this is it doesn't account for the management time and mental load involved in something like "Hire a researcher or expert consultant." For that matter "Cleaning services" or "Hire a graphic designer to turn your appalling sketches into ..." require significant cognitive overhead and time to hire and manage unless you or your spouse or close friends are already doing such things for your day job. If you're already doing such things for your day job you probably already thought of these things.
Some of them are pretty insane: people who need a maid to chuck their clothes into the washer and dryer, then put them away: if it takes you longer than 15 minutes a week to do this ... I have to wonder at your wardrobe. I mean, I understand some people deeply resent performing such menial tasks, or maybe they have large families, but it's not that big a job compared to feeding yourself and getting some exercise.
For myself, hiring experts to assist with my day to day life has been a fairly mixed bag, and my education, hobbies and lifestyle is such that DiY is usually the win.
Your working time is worth money, but your free time is free. Your time is only worth money (opportunity cost) if you'd otherwise be working on some money-making opportunity.
If it's 1. Hiring someone for $25/hr to mow the lawn while I work on a contract that's making me $200/hr, I'd choose to hire the gardener. If it's 2. Hiring someone to mow the lawn while I play video games, I'm better off if I mow it myself.
Anyway, maybe that's why I don't see a lot of those things on the list as desirable; if I have to spend two hours managing the graphic designer to make a chart/plot/figure, I may as well fiddle around in xfig or whatever to get it done myself.
Consider a large family with multiple children, a humid environment where towels have to be washed often or they smell, plus the safety precaution of washing outside clothes more often to eliminate any possible coronavirus, then you have the recipe for a full load of laundry almost every day. It easily adds up to way more than 15 minutes a week.
The overarching point of the author is that most of his target audience (and those reading HN) are used to being thrifty and not spend money at all, even when they get older. They fail to realize that at some point, it's worth your time to spend the X amount either because the value of investing X down the line is so great, or because the time saved by spending X is now so much greater than before, because of something changing in your life (career has progressed, valuation of free time has changed).
I definitely see this myself daily, ending up wasting few minutes each day on trivial things that add up, while it could be fixed by paying a small amount.
Or for example trying to wade through a free course to learn something, but ultimately just dropping it out of no motivation. Compared to paying for a course, which makes you more responsible s you paid for it and usually also offers more effective training.