I agree, I have a restaurant POS system and I think self-hosting would easily kill the product velocity, and if we screw up bad, even the company.
However, I do get the point about cost-premium and more importantly vendor-risk that's paid when using managed services.
We are hosted on cloudflare workers which is very cheap, but to mitigate the vendor risk we have also setup up replicas of our api servers on bunny.net and render.com.