No harm asking.
I've seen some retarded people in my day. Some of which own guns. I've seen people shoot a rifle at a target 25 yards away and miss by 6ft, oblivious to what was going on.
So I'm saying if you don't know what end of a screwdriver is the part you hold, or you shoot your gun and don't understand why a hole didn't appear, might want to stay away from the adjustable triggers.
It's more of a "stop f'ing with your gun and learn how to shoot" piece of advice than anything else. Some people can't learn the difference between tinkering to improve and blaming the tool for your performance. Which with firearms usually leads to dumb ideas. Like hey, I bet I'll shoot the best with the trigger set to the lightest spot!