That may be partially true, but I think those that got into DnD from Stranger Things, Critical Role, etc., will either not stick with TTRPGs or stick with them long enough to eventually discover other games. Especially considering Critical Role is working on and actively showing other systems.

I've played for maybe 15 years since 3.5e, and in my experience, the few that seemed more adamant about sticking to DnD are the older players that have been with it since AD&D. Players my age or younger (that I've encountered) seem to be more open to at least trying other games. And the OGL is the biggest reason why I started branching out more, and I try to tell that to anyone that brings up TTRPGs in conversation.

The hardest part I've found is finding others willing to GM said other games.

But with all that said, Fuck Hasbro. You just had to be (obstructively) greedy.