Not really wrong. For a long time the UCI did indeed ban discs. Then in 2016 they allowed them on a trial basis and backed off their approval after the Paris-Roubaix injury that the CPA claimed was due to the disc. At this time, I believe the UCI, at the CPA's insistence, still bans discs.

Suffice it that pro road racers do not use discs, not because of their braking inferiority, but because of safety concerns.