There are many places un-explored on Mars that will indeed provide a beauty unlike anything on Earth. This is an assumed fact, but it is mathematically just as likely to be true as the decision made that Mars sucks, based on current data.
We get there. We explore every bit of it. We find parts of it we can actually live on, quite comfortably - albeit, yes, still in a tank. But there could be parts of Mars we can transform, within a 100 years or so - just like the early settlers of every continent on Earth, ever in the history of mankind - and turn into a habitable place to live.
All it takes is one Martian generation, or two, and maybe there will be Martian-humans who have the conversation "I could never live on Earth, far too strange and unknown .."