ABDL is a very very small percentage of the population, and has been misassociated with pedophilia in the minds of many.
"Normies" who see full-blown ABDL out in public get the wrong impression. Images + video end up getting shared on social media, and some behavior gets posted on websites such as KiwiFarms ...
Even in the very confusing acronyms community, which I have disassociated myself a long time ago, ABDL is often times looked down upon as pedophilia.
What would a "normie" who doesn't know anything about ABDL, think if they seen someone out in public in full baby gear? What would the reaction of "normie" parents with young children, be?
Using exhibitionism in an attempt to publicly force people to accept, what they may perceive as pedophilia, can have negative consequences down the road.
Just to add: using incognito mode, do an 'unsafe' Google Image search for "ABDL" ... notice how quickly sexualized images appear in the results? That is how the general public oftentimes perceives ABDL - a sexual fetish.