Many folks today have no quality of workmanship. That goes for assembly line work or skilled work. People are just there to collect a pay check with very little effort. I see this every day.
but what if you as a worker notice the filters coming out like that, and adjust the machine, but aren't allowed to reject those already made? Someone will end up buying it (and it's got little to do with the operator) although the rest of the batch is a lot better.
But there's a lot of what you say going on. Maybe we need more OCD people....