I'm not a professional by a long shot, but there's no way I would carry a Glock with a chambered round in my waistband. That, in my opinion, is a Darwin award tryout.
That’s my point- I’ve only ever shot a few of them, never felt a need to buy one. Plenty of LEO’s carry them, safely holstered.
For a deep conceal, condition one or equivalent, a trigger-safety Glock would not be my choice.