Laid off isn't the same as fired. I've had to lay off people a number of times. Sometimes it's fine, sometimes it's really not. Depends on the person and circumstances. Just because it's usually worse for the person being laid off doesn't mean that it's not unpleasant for the rest of the people involved.

BTW I have also been laid off. Worked out really, really well for me as I was given a chunk of cash, paid leave and walked into another job. I obviously realise I was in a very privileged position but I just wanted to point out these things are rarely black and white.

I've done them all, so I can state with confidence you are objectively wrong about the subjectivity of the situation.

So the person who gets told to simply find another job in a few weeks is better off than the supervisor that has to develop a plan to systematically fire their best employees over the course of months all while also not being sure when their boss will do the same to them?

It sucks all around. No one enjoys having to downsize.