story
I think both parts of these are wrong.
There are a lot of times that folks who will advise others to do the thing(s) they wished they'd done themselves, but it's definitely not everyone all the time, and I'm not even sure if it's most people most of the time.
As often, probably more often, folks advise others to do the thing(s) that they _did_ do.
Occasionally, folks are able to give advice that is specific to the recipient. It's definitely not the norm, but I've run into it often enough.
tl;dr Don't dismiss someone's advice because you think it's all about them, particularly because you think it's all about their mistakes.