This is a guaranteed failure strategy. The number of people that will go and vote in person due to losing the postmark <<<<<< the number of democratic votes lost due to losing reliable postmarking.
Doing the right thing is about understanding statistics and fighting the right fights. It's a huge loss to further weaken mail in votes. A turn your nose up, screw you guys I'll just go vote in person doesn't move the needle. Republicans understand that systemic nudges are far more powerful than pitches for passionate action.