Marriage is a retarded concept for a man, so I won't touch that one. But a few things beyond jacking off in a sleeve.
Some escortcels have commented that they want more than that such as cuddling, kissing, etc. And those things can be had with a doll. Don't underestimate what your brain does seeing something pretty lying around with you after a hard day's at work. Gives me something to look forward to coming home to. The apartment feels less empty. Provides a deterrent from simping and wasting money on escorts since I can get basically everything with a doll. It's all in your imagination obviously and combining it with some primitive AI Phone Apps and it's like a GED... good enough.