If you have income automatically set aside for investments and savings, you already have a lightweight budget in the form of "I set aside X% or $Y every month and the rest is discretionary."

That’s the best way to live, I don’t like micro-managing myself.

I’ve dieted down to different weight classes for sports and tracking everything is pretty miserable. It works when there’s a single date up ahead. I can’t imagine micromanaging finances like that indefinitely. I’m with you: expenditures are about some number, savings for a house downpayment is about some other number, and that’s enough for me.

That works for you because nothing or anything would work for you. I am in the same boat, a budget would serve no purpose for me other than encouraging me to spend more.

For the people who need a budget, they would just run out of money completely before their next paycheck and either get kicked out of their apartment, or dip into their savings.

This is more than most people have in my experience, if this is all the budgeting prowess you can muster then you are potentially ahead of the pack already.

this is literally the financial equivalent of "if it fits your macros"

I think it can be useful even if you're able to save / invest "easily".

I'm in that situation. I'm fairly thrifty and don't spend much. But after looking back over my spending, I've realized there was enough useless crap that I could cut out. For example, I realized I was spending an enormous (to me) amount on lunches at work, though it was nothing fancy. It's just that I was working in a rather touristy / "rich" part of town, so aside from a pastry, everything was above €10. I started packing my own lunch most of the time and the cost went waay down for no discernible loss.

Bonus points for eating less and losing some weight, but that's a different story.

You need a budget at any income level. Saving more early means early retirement because compound interests stack well over years and years.

Or can save some hardness as you reach 55plus, when getting employed becomes harder but state welfare is still 10 years down the line.

An habit to budgeting helps because people aren't always top dogs.

You just demonstrated that a high earner has a budget to invest a certain part of their money. I don't disagree that as your earnings go up that the budget can become higher level.