First of all your park brake is designed to keep your ride from going by by at a minimal incline. Plus it only weighs 1100lbs. You also have it in gear while parked.
Second of all , when adjusting at the caliper, you just want the pads to touch, not drag.
Third of all , when adjusting the lever tension you don’t need it as you need your foot to push it to park. I use my heel to release it.
I do a adjustment check at the beginning of the season, and it’s good all year. It’s a very simple and effective device. Remember , it’s a parking brake , NOT an Emergency Brake