I agree with your post.....opinions. Everyone has them and everyone can agree or disagree. I’ve carried daily for years and still do not consider myself a professional. The key is....carry what is comfortable to you!! Carry different pistols/revolvers as needed. Carry multiple items as needed. 45’s...380’s....doesn’t matter considering having any gun is better than not having a gun at all! Get plenty of range time and shoot with the ammo that you will be carrying. Try different carry ammo and buy quality ammo! Buy quality holsters the first time and carry what is comfortable and safe for you!
But...all that is just my opinion! Personal example...at work...discreet carry pants...S&W Bodyguard .380 chambered with Hornady Critical Defense ammo...holstered in Alabama Holster Company right pocket holster...extra mag in Alabama Holster Company pocket single mag holster in left pocket. Most any other time...Glock 30 chambered with Hornady Crit Def ammo...holstered in Comp-Tac Minotaur IWB holster/right strong side carry...two extra mags in Comp-Tac dual belt slide holster on left side. It’s a win/win on any occasion! Too bad all my holsters, ammo and firearms were lost in a tragic boating accident....sad day!
And...as far as YouTube is concerned...my authority of choice has been and shall always be...Hickock 45! My favorite and highly entertaining!