Concussion denial: in mixed marital art (or UFC) fighting like bike helmet debate?

[Nandy]

All this denial, is similar to nay-sayers on bike helmet use.

There is no helmet debate where bikes are used for sports.

An adult who is familiar and proficient at riding rolling down the block to the store on a Dutch bike is not exactly MMA-level risk, and should be able to make that call on their own.