It is, but I didn't see the OP specifying that X forwarding being essential or anybody asking if other options would be acceptable. There are a few situations where literal X forwarding is the solution, but it hasn't been established that any of them apply here If VNC isn't an option, I was expecting that the post would just get ignored. But, given the amount of posts and people involved, it seemed to be prudent to try to find out whether X forwarding really was actually required, or if there as more of a hyperfixation on the thing the OP was trying.
Plus, there are no-install VNC clients, so that's potentially an option while the rest of this gets sorted out.