Sometimes people are ambitious, sometimes they are not, but often there are things they'd like to change or learn but just have never spoken up about it. This is my chance to tease these out. I do work in a fairly small company though, where we have the power to change things and tailor things for our team, so that may be different from a lot of people posting here.
You are right to acknowledge it is different in different organisations. The issue for us is that our Team Manager doesn't have the power to make any significant changes - she is constantly working to try to give us a half decent chance at completing at least a small amount of our job, but we are so short staffed, and having to take up work from other Teams that have been cut through austerity, so just 'doing our job' isn't possible anymore.
The more you prepare and contribute the more benefit are likely to obtain from it.

Oh, if only life were that simple for all staff in all organisations. It would be lovely if that were the case.
Appraisals are so outdated and as for setting SMART targets, these just don't work if you do the kind of job where what's happening changes daily, especially if these targets are linked to the work of others that you have no control over.
This ^
When you are told you 'have to' have a target about things you have absolutely no control over, the whole situation is then farcical, which is one of the reasons why so many people think it is such a waste of time.
Our appraisals are standard Council Service ones and unsuitable for my work as a peripatetic teacher. I resent being given targets/work challenges that will inevitably have to be done in my own time.
This ^ too. (I'm not a peripatetic teacher, but same principle) - big organisations like Council think they can squeeze into the same box, a person that stands by a barrier in a car park, raising it when people with the right pass arrive to park, and a senior lawyer or accountant or strategic director. It is nonsensical.
I just want to do a good job and go home!
Quite.
In fact, this x 100%.
Some people will want to 'develop' or go off in a new career direction, but, lets be honest, at various points in our lives, all of us want this.