I do remember a few kids in high school that were Flash pros pretty early on (as early as 14). I don't recall those kids moving on to actual game development tools. There must have been something very friendly about Flash's onboarding. I'd be curious to know what the equivalent is for kids now days (would be surprising if its Unity/Unreal/Godot). Sort of asking for myself here because I can't for the life of me grasp the UI driven development of Unity/Unreal/Godot.