You dont know many poor people, or very young people.

I work a furry convention in the Southern US, about 3% of our attendees have some ID related malady - can't get a timely appointment at DMV, missing core documentation, unable to prove residency, etc - nevermind rural voters who may live hours from a DMV.. which they can't get to without a license (assuming they can afford a car) or a ride. No bus service to speak of either.

Its a huge issue, I'd 100% support voter ID if getting an ID was free and easy, without it I'm skeptical.