Earlier quoted context omitted.
I'm sorry the hear that, and I think it's mostly worng. I should add though that some activities are indeed useful, one of those is certainly teaching. If PhD students have full responsibility over the course, or part of the course, of which they're entrusted, it can be a very productive activity. It is particularly formative if PhD students are entrusted with teaching activities covering subjects closely related to…
> Apart of few exceptions, professors need PhD students more than PhD students need professors. Can you elaborate on this? I'm not disagreeing, but colleges/professors certainly like to project the opposite in many cases
Students by contrast need professors for training and advice. Whether they receive these from their advisor depends on the lab. In bigger labs junior students learn more from senior students and post-docs than professors.