I don't think you're being understanding or empathetic here.

Any vendor that delivers updated packages without thorough regression testing that ends up causing an incident for their customers as a result will get a thrashing from the community.

Maybe Ubuntu and others are cutting corners to deliver more quickly. It's their risk to take, but it's still a risk.

Every vendor is winging it there. Even RHEL. Ubuntu ships shit half the time as well even on LTS.

If you need to test it you should pin packages.