Some experiences of open source rest on the OSD, but not all. If your experience does, that doesn't invalidate your experience. But your experience doesn't invalidate others', either. Browbeat or excommunicate all the heretics, I think you'll find yourself preaching to a much smaller choir.
Granted: OSD, or rather the OSI-approved license list, rules in enterprise procurement at a particular and fairly common level of sophistication. At the same time, I've had conversations with sponsoring companies, prolific contributors, investment types, and others, mentioned OSD, received blank stares, explained, and then heard they don't care. Not relevant. Does not resonate. Different experiences.
I have never seen any good evidence to back your claim of a quiet OSI majority, except if you count open source consumers as an inevitable majority over open source producers, and ascribe the former to OSI. My own direct experience of open source licensing news and work has been a constant drumbeat of interest in refining and expanding licensing models. HESSLA. Fair Source. Now Commons Clause. Experiments. They're coming faster and faster.
Many of the folks advancing those proposals, like the one linked here, are also creating relevant software. From their point of view, claims that their work is "destructive" ring hollow, since they're constructing lots of code for others to use. They're especially irked by criticism in consumer-centric terms, like those of the OSD. After all, the OSD isn't a _license_ compatibility guide, but an _institutional_ compatibility list. It doesn't tell you which code you can get into an open project. By corporate handbook fiat, it tells you which code you can get into your company.