I'm saying they shouldn't punish players for doing this if they do nothing about a bigger problem.
They don't do "nothing" about bigger problems in the game. They're just incompetent when it comes to getting results. You seem to assume they'll somehow be magically more effective at banning cheaters there than they are at banning cheaters elsewhere. How many people have been banned so far for afk chigoe killing?

"Oh, but they could be spending their resources to do a better job at getting the REAL criminals!" Everything has a point of diminishing returns. Sometimes it doesn't matter how many people you have standing around that soup pot. It doesn't make it done faster or taste better to have 500 chefs there.

The same thing could be said about cops: "Why are you catching jaywalkers when there's still unsolved murders?!" Against the law is against the law. True, most people get away with jaywalking. But if a street suddenly became absolutely crowded with people who can't seem to stay on the sidewalk, cops would have to start cracking down on jaywalking, wouldn't they?

Just because some people get away with felonies doesn't mean that cops should completely stop enforcing the law when it comes to misdemeanors.