These are established and well known patterns. Better other people get to learn them sooner. The seasoned developers have probably experienced the problem they

These are established and well known patterns. Better other people get to learn them sooner. The seasoned developers have probably experienced the problem they solve and the juniors might be saved from doing the same mistakes as others have before them. The argument that juniors will have a hard time understanding it can be said about anything you don't like / don't want. And then you can begin to lay it on thick. It's a convenient scape goat for sure.