No, it's correlation not causation. When you get older, you see everyone making the same damn mistakes you made, but refusing to listen to you. Various reasons are given as to "No, this is different", but it isn't.

Then, worse, you remember yourself saying "No, this is different", and how wrong you were, and it kinda bums you out a bit. You're watching a replay of yourself being a dumbass, which makes you angry at the situation.

That doesn't mean every old person is negatively inclined, because some will think "Well, this is the way of it", and take solace in that fact that it's been happening since at least the start of recorded history. You, and your ancestors are one. And you finally get your grandparents.

So even the optimists, feeling better, think "might as well play my part" then yell "get off my lawn!"