I wonder what the general reaction would be if the track and swimming athletes started blinging out their uniforms. And think how rhinestones could change an outdoor tennis match ("Ah! I was blinded by her sparkle and missed the lob."). We don't see basketball players with flesh mesh cutouts and archery athletes don't wear essentially backless uniforms.
(I get, I do. My little heart loves sparkly stuff but time and place also matter to some extent. Compared to many other sports, gymnastics looks like a pageant which I think devalues the athleticism and work the athletes put in to the non-insider audience. Pretty little girls, dancing around and all that, when women's sports are already often disrespected. The infantalising commentary that elite gymnasts get exacerbates the problem, no doubt. NCAA did better with KJC, but with her gone...well, we'll see. I'm not going to touch RG and artistic swimming costumes and make-up with a 10 ft pole)