[shoguning]

Maybe, but it makes it a lot easier to transfer to a different lab. It's also part of a cultural frame of mind. In broad strokes, here are two approaches institutions can take to recruiting grad students:

i) Admit tons of grad students, treat them like shit and just assume many will drop out/quit so you don't have to do any long term planning on resources/admissions.

ii) Plan projects and resources, vet candidates and treat grad students well. Attrition will be lower so this does allow for longer term planning. In addition, here the institution and department are involved in the planning/resource allocation and presumably personnel issues as well. In general culture will be professional.

IMO i) gives signals that harassment and other mistreatment is tacitly allowed. With ii) the grad students are valued and signal is given that this should be a professional environment. Another generalization, but I have observed American universities, especially engineering departments are close to i), European universities (some countries more than others) are closer to ii).