Some people don't have mechanical sense. Some learn, some don't, some don't care if its not their expense. When I was 14-15 years old I ruined a couple motorcycle engines,1st filter neglect, 2nd I left a clamp off the boot going to the carb and it sucked dirt. Most filters will suck fines through you run them clogged and then some gritty moist carbon accumulates and makes a wore out mess of the internals.