I don't run Linux, and I've never had to deal with X, so this isn't an emotive issue for me. But your post was clearly not a serious of facts, more of a backlash against perceived slights from Wayland developers and/or "fanboys", the latter being a useful way to smear people who disagree.
Your post might make more sense if the existence of Wayland meant that X no longer existed, but as that's clearly not true it's hard to take claims of "throwing out a perfectly good system in favour of an ideological rewrite" seriously. And ideology? There have been plenty of technical arguments since the beginning, here's one set that was posted on /. a while back, and it's just the first one I found.
As far as I'm aware X currently does act like VNC in most cases, except without any compression at all and a synchronous API - so nobody uses it directly because of the performance issues, instead using ssh as a tunnel. Even having it act like per-window VNC with H.264 compression would be an advantage. But anyway, that's all part of the compositor, which now has RDP as part of the core, and I've yet to see any explanation of why or how X forwarding is different or better than rootless RDP.
The assumption that forwarding is a critical feature is based on the idea that your personal requirements are the only important ones. If a piece of software doesn't do what you want, don't use it. As it turns out, they are supporting it (as I'd read from pretty much day one), it's just taken time to get to that point... as you'd expect from alpha software.