I wouldn't have a problem at all with a fingerprint ID as long as the person putting the fingerprint in the ID system was properly identified - and that's the rub - how do you do that without proper picture ID, verification of address, citizenship, etc. Fingerprint ID works great on my phone. There has to be some kind of positive ID to start with - more than a signature or ID without a picture. My signature like most people's isn't what it was years ago when we actually used to write - not a good identifier any more.
72 has joked about voting in the three places he has property, and likely there are people who actually do that. My son moved away, registered elsewhere in TN, voted in an election or two there, and he still got a new voter ID here when our polling location moved. Election commissions have no clue if voters are registered in other locations or how many other locations. Maybe people are honest; maybe they aren't; but with open voting season, it's no problem to vote in multiple places. I know from what I've seen, I sure wouldn't worry about them catching up with me if I voted a few different places in the same election. To catch fraud, you actually do have to look.