Because alternate older me tried that and got brain-touched by Xavier for his trouble.

[ His words are bitter, angry, and his fists clench. And then he sighs as he slumps a little, and just looks tired, and very sad. ]

And because... to save your timeline, and all of you yahoos, I gave up the power to time travel. I lost the chance to ever go home, or anywhere else in time, unless someone else does the driving.