I rambled a bit so I put a TL;DR
you say that but brigittes pick rates have dropped even more (both tracer and genji the people she’s supposed to counter are above her in pickrates now in grandmaster and she’s not even 1% higher in pickrate over Ana, genji almost tying with her in masters with tracer and Ana not far behind, in diamond she is still 6th most picked but with Moira at .06% pickrate behind her, Genji .03% behind Moira, and Ana .07% behind him), it is not because of brigitte at all, its because of hanzo, hanzo and zaryas ults together are just too strong together, and with Hanzos rework it makes Reinhardt required because Reinhardt is the only one with a barrier that can defend his team long enough Orisas will be gone in seconds with the hanzo changes and Winstons is just orisas but weaker longer cooldown and larger hitbox meaning a reinhardt is required to have meaningful protection (I feel like I rambled a lot so a TL;DR)
Hanzo is the problem Brigitte hasn’t been a real problem since her most recent nerfs, he’s the meta defining one
I suggest reading this post warning its quite lengthy