In fairness, Mike Glover and others from the .MIL who have worked in low visibility or actual covert ops in denied areas - Yes they did in fact actually carry Glock 19 and 17 size pistols 16+ hours a day in true concealment. They were also operating in high threat environments and carrying those guns and mad gear etc. because it was what they were doing for a living.
Worth noting that I was critical of Mr. Glover earlier in the thread but he is certainly no stranger to concealed carry. As I recall his earlier videos regarding transitioning from Glocks to the SIG 320 Involved the 15 round Glock 19 sized compacts.
Regarding battle belts. One of the advantages to a battle built in the tactical or LE Context is you can throw it on over rain gear, cold-weather gear, etc. in the LE world I’ve worked with some agents who literally throw a battle belt and body armor on over a shirt and tie Because after the target location is secure they have to transition to conducting an interview in a suit.
While that is something of a niche use, the idea of one of the original Brokos style belt with the padded rubberized interior as a grab and go solution for the house is not too far fetched. You can grab one thing quickly clip it around your waist and have a gun extra mags etc and most important in that context a flashlight that is not attached to the gun all in one package. It’s very fast to both doff and Don. It will work over a bathrobe, pajamas, or even if you are naked. For the latter I would definitely stick to the original padded rubberized style versus the new cool guy belts with the Velcro inside. Could get a little scratchy.