...I think that's only logical. Sane, even.

Having it taken away from you, all your physical agency, being reduced to nothing more than a thoughts in a void, it's not pleasant. And being trapped in a virtual world for years can warp what's left of your mind. Experienced the former, witnessed the latter.

At least if you remove 'you' from 'yourself' willingly, you have the option to go back whenever you want.