Engineering is all tradeoffs.

For this guy who spent thousands per month on AWS, using AWS makes no sense.

For a guy like me whose AWS bill was 38 cents last month, AWS makes a lot of sense. Currently I have a small KaiOS app with about 1000 unique visitors per month hosted on AWS. I used to self-host on an old laptop, but it costs less money to host on AWS (1 kwh cost me 19.89 cents and my laptop uses about 4.5kwh per month). Not to mention the convenience of not having to restart my server for software updates, or update my own certs every 3 months, or fuddling with nginx configurations.

And my AWS bill ever starts climbing, I will just self host once again.

You could probably bring that down to 30 cents on nearlyfreespeech.net