You just don’t have to pull them very far.
If you measured you would find that Glock has a pretty standard length of trigger travel before the striker is drawn and released. The only difference is that the 1st 1/2 of the pull is lighter than the second half. A smith & wesson auto will only have a couple more pounds of force required than a glock, where S&W tends to put a 10-11 pound trigger pull on thier pistols.
If someone is relying on the trigger pull weight or length of travel for thier safe gun handling practices then they are violating a fundamental rule of gun safety by having their finger on the trigger when they ought not to.
He needs the police version , Glock 80 pound trigger.