What right do "some people" have to determine for those who wish to play Irish music in the UK, that the Irish music is being played "to the detriment of others forms of folk music"?

Talk about sheer bloody arrogance! Do you know how large the Irish population in Britain is? Are we including Northern Ireland in the "North of the UK" in our geopolitical definitions here? What happened to the "if you don't like the music being played in one pub, it is your responsibility to find another one that suits you" argument? Is there an unspoken Irish music disclaimer here, ie that if the session is an Irish one, you should do your best to close it down so more "diverse" music (read: music close to the heart of all English folk) can be played in said pub?