I don't know what a "full sive " is . I do carry a cartridge in the "chamber " with a striker fired pistol carried at a 2:10 position and extra mag for a single stack. Holsters keep the handgun safe on you and handguns don't go bang on there own. A safety on a handgun does not make it safe in the hands of a dummy or someone showing off. Take your time and learn to draw smoothly and quickly but not fast. No quick draw stuff. Watch and see , shot by his 1911 and a finger where it should not be -
Your issues are nothing more than a head game only you can work thru.
I don't want a laser and don't want to rely on one. I practice a type of point shooting out to 12 yards to keep my rounds in a tissue box area on the target rapid fire. Carry a light to see a bad guy and use nigh sight so you can aim at them if ever needed.
At least that my view of it.
Now if you feel a safety is a must have then sell your pistol and buy one with a safety but its still your head game. M&P has them and taurs pt111g2 is a striker fired trigger pistol with a safety. Smaller and lighter and 12 rounds.