Honestly.....no, anyone on here will tell you that. There is a lot of contaminants that kind of bond or get stuck to your paint, that a touchless won't even DREAM of getting off. Take bug guts, in the front of your car for example, go through a touchless wash sometime, and you'll see for yourself, won't even budge it. A touchless wash JUST gets the LOOSE stuff out of the way.
On a side note, a touchless wash is VERY harsh on any wax or sealant you have on your car, dont ask me how it can remove the wax, but not the baked on stuff, I couldn't tell ya. But the stuff thats stuck on just won't come out, unless gently dislodged and flushed away.