This is circular reasoning.

If a majority can agree not to increase the blocksize limit, then that is a consensus decision by definition. The logic wasn't "no increase, because Bitcoiners say no to everything, always". The logic was "no increase, because it's the wrong decision at this point in time, for design reasons".


When a case is made that makes sense to the majority of Bitcoiners, they'll accept a blockweight increase. For instance, Segwit was an increase in blockweight, and Bitcoiners accepted it. So it's already happened, saying "it's never going to happen" is a difficult argument to sustain given this reality.