You don't understand what mind reading means. Your mind enters his brain so it must hold two consciousnesses. This will create like brain lessons, and probably develop split personalities, or perhaps part of your mind gets cut or copied in his. Its not like Prof. Xavier. Think of it like two computers. To hack one, you go inside and leave a mark. Your computer has firewalls if you are volunteer or not. And those have to be taken down, the hacked computer has fewer resources to sustain the intruder.
Remember that mind magic + transmuting bodies are against the law specifically because its unnatural.
A soulgaze is different. The souls get to meet and poke each other, and even in this event leaves marks on each other's souls, forever. But the mind is fragile, and the body needs to function properly.
So even if I would volunteer, the process would leave me scarred and become a victim, where as the caster would have a stain on his soul of inflicting this damage on my mind.
If you want to read someone's mind, just ask him since he is a volunteer. If he is not, use some red vampire saliva on him. best trust detector out there, or put maneuvers on him via intimidate/rapport or break/shoot one of his arms until he is taken out your way. And you define he spills the beans.
From a game system point of view, mind reading is game breaking, leaving social mechanisms useless, plus you as a PC can get mind raped by major powers like the fey queens. Secrets have power and you wouldn't want that power stolen, would you?