One could retort that nice conspiracy theory to almost everything, and some people actually specialize into it. Now the thing is, having some constraints is a great way to get aware of a problem and try to solve it. This of course doesn't fit well with the whining mentality that some groups try to implant onto other for their own benefits.
In what sense is it a conspiracy theory? Look at what COVID-19 is already highlighting over there where people can't get tested[1], get no help for being unable to work, etc.
[1] Unless, of course, you're a baseball team and then you can get instantly tested.
To that a counter-retort may say, even if we acknowledge the "systemic unfairness" in the US, the country is leading the world as far as entrepreneurship and startups go.
Your meaning of "being interested in ideas" and specially "stuff" is different to Graham's.
This is not a surprise because both "idea" and "stuff" are just generic placeholders in which you can enter whatever you want.
I see that a lot when I write or speak to a big group of people. No matter what I say somebody somewhere interprets it in the worst possible way I could barely imagine myself.
There is a very small group of people that are thinking about these ideas at a higher level with enough conviction that they will act on it.
For all sorts of reasons, no doubt, but that's what it is. I didn't even meet another developer in the wild who actually liked building things on his own until I was in my late 20s and we became co-founders. And I went to a large public university with a good comp sci department.
Not everyone is going to be a creator. Not sure what is so controversial about this. Getting hostile over the word "thin" seems a bit silly since it's also completely unquantified. And I wonder what your life circumstance is if you're encountering more of a "thick" stream. Are you a hackathon event planner or something?
What is pretentious about the quote that started this thread is the apparent belief that the kinds of people that do the things we talk about and admire on this site - building new kinds of software, starting growth-focused companies - are the only people "that are interested in ideas and making new stuff". I agree that there is a fairly thin stream of the building-software / starting-companies hackers that you're thinking of, but I see huge numbers of people from all walks of life being interested in ideas and creating things. Artists, writers, journalists, directors, bureaucrats, other types of business people, on and on and on. I think it is pretentious to look down our noses at pursuits that are not our own, that's all.
Your comment about hackathon event planning is illustrative: hackathons are honestly not at all where I would go to find the highest concentration of people creating interesting new things.
Ideas are cheap. That long-nursed startup idea you've had has been tried a half-dozen times and discarded even more.
This really stood out to me - what an excellent articulation of the intrinsic reason why founders want to be founders.