This seems to be an unpopular opinion on HN, but you are correct. It is possible to generate millions in revenue with 1 or 2 devs. If you manage to do that, paying a higher than average price for AWS is a no brainer.
I've just moved a client off EC2 because the premium they were paying would have been a massive problem. The 85% reduction in hosting cost has bought them months of extra runway. Their operational costs related to their hosting also dropped - there's simply been fewer issues to deal with.
I'm sure there are instances where AWS is fine. But there are also plenty of cases where it is a matter of survival to cut those costs.
But I don't live in a world where runway is a consideration so YMMV. At the time I commented, the parent post was getting downvoted. I've seen that knee jerk reaction on HN multiple times, and that is what prompted my comment.
It's kind of hard to get numbers though since most private companies don't trumpet their revenue numbers or engineering headcount.