What do you do if you skip such a meeting and a decision you don't like but that you can't weigh in on anymore is taken there?
If not. Then I'll have to either live with the decision or at least give feedback on it.
Nothing is final until you build it (from a developer point of view).
Skipping meetings because they aren't organized the way you like is pretty passive aggressive. I agree with all the criticism about poorly organized meetings, but I think the non prima Donna thing to do is push back on their existence or format, not just skip them. That's part of why a job is a job.
Business value first
But the other poster was saying it’s prima donna behavior to skip a meeting without asking the organizer if they can add an agenda first.