Why are people arguing as to what is or isn't a sport - as though there's some kind of hierarchy whereby sport is the best/most worthy, then dance/art/games come lower down?
It's absolutely fine to say that you think some forms of dance are far more interesting or impressive than some forms of sport, and vice versa.
I can't help thinking that people maybe subconsciously stereotype sport as generally 'men's stuff' and dance as mainly 'women's stuff' - so they feel a need to prove that 'women are just as good as men'.
Women can indeed be as good as men - and are frequently far better - in just about everything (however you choose to quantify it), without any need to seek to 'man up' traditionally female-dominated pursuits in order to justify their worth.