The OSIs purpose is to be a trusted, legitimate source of truth for what open source is and how to use it.
When they fail at holding meaningful, equitable elections, and when they push through controversial work like OSAID and then gag board members from disagreeing with it publicly, they undermine their own work.
I don't know if the OSI needs to exist right now to legitimize OSS. It doesn't stop snake oil OSS or open washing. Surely the public can just call a spade a spade on their own.