But Xavier is a telepath

He did in the comics

Professor Xavier is a test not a telekenetic. He can read people's thoughts and even control their actions. So the only way he can move something with his mind is to make Jean Grey do it for him. If she's feeling up to it. She tends to get weak spontaneously

He's telepathic, not telekinetic.

He was actually secretly telekinetic and did use it to move his legs. He also used it to throw Magneto into space. However, I haven't read a comic book since like 1993 so they may have retconned all that