I have to wonder if these people like this buy waste basket bags for their smaller garbage bins. Because if you are on the "I can't use a plastic bag" because of "muh environment" but still buy plastic bags anyway, then you are not even doing your part by your standard.
Besides, grocery store plastic bags tend to have handles on them, which makes it real easy to tie your garbage when the bin is full.
But no, we have to virtue signal that we are "doing my part."