Except you miss out on a couple things. No one can "touch" for anyone else.Cat lady, MN has same day registration and if someone else touches for that person, they can make up any name and address they want and they can then cast a ballot.
But if you meant vouch, that isn't quite true either. The only person that can vouch for an unregistered voter is a registered voter in that precinct. They do so under penalty of perjury. Someone vouching who is not registered would not be accepted at the poll. Then while the person that registers at the poll would be allowed to vote, their registration would be followed up on in the normal fashion. Lying while registering would be found out and the person vouching would be subject to criminal prosecution along with the newly registered voter.