And just because they don't dress the way you do doesn't mean they don't.
Until the emergence of self-conscious orthodoxy in the 1800's, the distinctions we make about types of Jews were unheard of. But with the reform movement came the fear of movement to the left, so ultra-orthodoxy came to overcompensate for that threat. But those that stayed in the center, the ones that you now call "modern orthodox," were the ones that remained unchanged. So it's not that we have unlimited Kulas, it's just that you have unnecessary chumras that are improperly declared as deoraysa.
This is the MO argument justifying their way of life. They invented new hashkafos in the last hundred years, most of them based on the ruach of "enlightenment", like using secular names, being secularly educated, embracing non jewish culture, less respect for limud hatora etc etc. While the chareidi hashkafa has not changed since we were in egypt. We separate ourselves from the nations and put an emphasis on limud hatora. Nothing new at all. Yes, some of the yeshivos are structured a little differently, this is not "reconstruction" like the MO have done.
Was there a YU in Bavel? Did jews look like goyim 500 years ago?
They call themselves "Modern", a term that by definition means out with the old and in with the new. As if they can improve anything over generations of ehrliche yidden.