The way that there genuinely is just a lot of kids who turn a certain age and become little assholes makes it so much worse. Like Bruce is like "kids just become haters sometimes chum, don't take it personally" meanwhile Tim just lost everything
No but seriously- coming from a big family watching dozens of kids grow up, theres always this "switch" moment growing up- or well two.
The first being when a kid first really becomes "sentient" you start to see who they are, even if just loose bits and pieces, the outline of a sense of identity.
The second? They're a full person and now the full consequence (for better or worse) how they've been raised. A solid identity has been formed.
Like after that second switch you're constantly changing and growing but never again as DARASTIC a change in such a short period of time from what ive noticed.
AND Y E A H- though that lecture was more towards Jason for other reasons, its still a version of "reality" Bruce tried to explain to his kids. Of course is he right? In this case no. But detective is not synonymis with omnipotent.