It however isn't about all or indeed any of those devs being obligated to support any particular choice. You can only buy a place at the table with money or sweat and merely using something isn't contributing and doesn't get you a vote.
Arguably the problem isn't the display server its the fact that general linux usage tends to require a little understanding of what's going on under the hood than is strictly speaking desirable for joe average user especially when something doesn't work. EG needing to understand that your choice of display server is making your zoom calls not work and then having to open that whole can of worms.
The fix is honestly more labor. The trivial way to acquire more labor is with money which is hampered by the fact that so little is paid. If you want more polished stuff pay more.
No. If you tell users they should switch to a new display server, you shouldn't be surprised if no one takes you up on it if you don't provide basic feature parity.
If you tell DE/WM devs they should use your new protocol, but say it's now their responsibility to do all these things that the old display server did for them, don't be surprised if it doesn't get much traction.
I don't for the life of me understand why wayland took off. It's provided no benefit to the average user, or DE/WM dev, and a whole lot of hassle.