How many people in your life re-use grocery bags? I'm fairly certain grocery bag bans are a net-win when viewed from the perspective of total plastic usage, because MOST people would have to be using them at least twice for the result to be anything other than a net-win from any perspective but mine. I only managed to use about as many as I was given because I got pretty good at remembering my re-usable bags...
The problem is not the burden of changing my behaviour, or the extra cost of buying exactly as much single-use plastic as I need in the form of a box of trash bags a couple times a year - the problem is why are we starting with this?? I'm dead certain that there are a ton of single-use plastics we could ban that would have close to ZERO impact on 99.9% of people's lives, because it would be handled entirely by industry doing a single re-tooling of their lines, but we're not doing those for some strange reason?