I think you're not reading what I'm writing here and just replying.
What I'm saying is that they don't have to make an origin movie to introduce the X-Men to MCU. People already know the X-Men. They could introduce the X-Men to MCU without Xavier in the era in the comics where Xavier is no longer in charge or part of the X-Men. In the MCU a lot of things they've changed from the comics like who cretes Ultron is Ant Man Hank Pym not Ironman and Hulk like they did in the movies. There's a lot of changes from the comics in the MCU, like the Ancient One is a man in the comics and in the MCU is a woman. So, they don't have to introduce the X-Men when they were young and under Xavier wings. They could introduce the X-men as the team already formed and Xavier no longer being part of them. Xavier could be mentioned in the movie but not being a part of it.
I feel like if Xavier, Wolverine, Mystique and Magneto are introduced to the first X-Men movie in the MCU they'll still the show again from the real first class which are Cyclops, Jean, Angel, Iceman and Beast. Let them shine for once!
We had 19 years of X-Men movies about Xavier, Magneto, Mystique and Wolverine. I really can't stand them anymore. They aren't essential to the X-Men. The comics survived years and years without them.