Java has these scaffolding developers who spend great deal of time in writing, 'ticket booking', 'toy/video stores' etc with all technology, framework, libs they are looking to learn. None of this code does anything useful but developers add to their resume claiming they developed reservation systems and e-commerce platform with mongoDB or whatever.

I'd add this kind of bullshit started directly from Sun Microsystems when they gave us Java EE blueprints to develop end-to-end enterprise solutions in all seriousness.