It’s the normal, default state of affairs when you have seniors and managers who feel they are competing with each other and so hoard knowledge and techniques, and assign themselves all the interesting work while juniors are left bored doing rite work. In several workplaces when I’ve tried to organize shared spaces like a commons, lunch-and-learns, etc., management had been actively hostile. I had one asshole manager who would even shut down any water-cooler conversation. I finally wound up mentoring a co-worker who needed help with C++ entirely off-site during lunches.