Why would someone wear tights if it put them at a disadvantage?
You can't tell me those tights don't give the grappler who is wearing them more grip to control their opponent on the ground.
No, my friend. I'm saying that I'm all for fighters dressing in an advantageous manner. Grapplers would wear tights. maybe a gi (which I'm still on the fence about). Strikers would not. They'd go shirtless, most likely with tights or loose shorts, or maybe something flashy like those gladiator shorts Melvin Manhoef wears.