Oh, you were not joking.

No, people do not care. You're not a celeb. This is textbook spotlight effect.

Your life becomes a lot more enjoyable if you don't take yourself so serious, try it sometime

This can be read as why to avoid LinkedIn. Job searching is already hard, if you manage to land an interview you still have to spend time, as an old dude, studying Leetcode like you're a kid with five years experience instead of twenty. Then it's competitive. Etc.

So to this you wish to add the increased risk of negative exposure by saying a bad thing? Or that someone, someones, or people five years from today consider a bad thing?

I love writing and posting and engaging (you can tell from my history here alone), but I'm not crazy enough to risk spilling my feelings on a site full of people in suits and ties, with Leader next to their names.

Can't you delete your LinkedIn posts anymore after you posted them?