There is also the "problem" of mixing professional and personal relationships. There is absolutely nothing wrong with this, but some individuals absolutely do. not. want. For teams where the workplace is the social hub for most but not all, those stuck at the social periphery are most likely going to suffer professionally. And this doesn't even get into class differences (as in, those protected classes, not socioeconomic) and feelings of not belonging.
This is quite late, but I just want to clarify: I am not "against" diversity. I am merely contesting the idea that the answer to all issues around having employees feeling uncomfortable or discriminated against at work is not as simple as: "just add diversity". I have no idea what the answer is, but the research and my experience suggest it is a lot more complicated than that.
There is also the "problem" of mixing professional and personal relationships. There is absolutely nothing wrong with this, but some individuals absolutely do. not. want. For teams where the workplace is the social hub for most but not all, those stuck at the social periphery are most likely going to suffer professionally. And this doesn't even get into class differences (as in, those protected classes, not socioeconomic) and feelings of not belonging.