It is out of the goodness of Professor Xavier's heart, but it also directly benefits his agenda.

If we were to not control our powers, and we were to cause massive property damage and harm to the public who is already against mutants it would damage Xavier's message that we are not different enough for this to be a concern.

The senior staff is of no threat, provided you do not steal Logan's beer or touch any of Dr. McCoy's ongoing experiments.

You can trust them.