its not because they can set people on fire
its because the class has incredibly low skill plateau and the vast majority of people play it in such a way that shows that they really have no interest in actually going about their actions intelligently since they dont have to
playing pyro with the shotgun as primary and airblast as secondary was viable before and is even more viable now, so the people that played the class intelligently actually got rewarded, whereas the ones that dont didnt
thats fair