It can be made mandatory that every rider has to wear protective clothing to a given standard.
No appropriate gear, bike gets confiscated.
Now, the questions are, should you and who would do that?
In the absence of laws enforcing ATGATT, may I commend those with enough foresight to see the benefits and act accordingly.
Even in the summer heat, the road surface is still harder than you are. Sweat can be washed off, skin grafts on the other hand...