it’s my own feeling that it isnt ok but im not a rabbi. but neither are the people saying its fine so were all just saying our opinions. DY basicly did a great job by hisself showing and explaining why it shud be avoided, and i think common sense and a lack of complete amaaratzus wud agree. that’s who.
if you mean why do i feel it’s my job to let people know it isnt alright to go to a mixed gym, well i think most people watching a pirtza in klal yisroel going on and can stop it would at least try. i can not and will not sit idly by when someone with a lesschumra agenda wants to publicly disregard/promote basic shmirah for kedushah. if people wanna go somewhere assur i cudnt care less. dont go around saying “why is everyone being so strict? theres nothing wrong”