they do not want intervention or care
I'm don't think you can say that in general. They might not want the intervention and care they are offered, which usually comes with strings attached. Eg. homeless shelters in my city require you to arrive at a specific time, leave at a specific time, and you can't bring alcohol. Plenty of non-homeless people would be kicked out of their home if they had to stick to those rules.
My recommendation for everyone is to use Fastmail and a custom domain.
Fastmail is extremely reliable, and since they charge money they also offer customer support. A few years ago I lost a lot of emails due to a client bug, and Fastmail support was very helpful recovering them from backup.
Use a custom domain so you can change providers in the future so you're not locked into your provider and can change if you aren't happy with them anymore.