Yes, but when you do manage to get people to "say what they mean" I had the following response from a frontend bloke (me being on the "backend" side, even though I never refused to work on frontend per se): "I don't like you and I don't like your stack, I want to make decisions regarding frontend without consulting with anyone, I want to get promoted for running a team which overcomes any hindrances related to either how the product actually works or that human collaboration requires communication."

It is not about "nog being able to collaborate" - it is about refusing to do so.