

Reverse DNS is different than static IP.
But yes for outbound email, if you can’t control reverse DNS you will have pain. (Inbound is totally fine) You can in theory just use whatever hostname the ISP’s reverse DNS resolves to however you will get some spam score (or be rejected) as it doesn’t match your “from” domain.
Outbound email is a huge pain really no matter what. Unless you have a long-term lease on the IP and it isn’t in a bad network you really have to pay someone else if you want reliable delivery.
You are misunderstanding. They are forcing people to use LLMs at the cost of productivity so that they can hopefully find places where LLMs can improve productivity.
This isn’t really unreasonable. They are basically trying to get ahead of the adoption curve by forcing pre-mature adoption and find use cases. Bezos loves firing workers so this is basically a win-win. If it works they offload more work to LLMs and fire workers, if it doesn’t work other workers get a bad performance review and get fired.