All of the loaded guns I keep around have a round in the chamber, or chambers as suits my DA revolvers.
As I own and also shoot Glocks, I consider myself to be a 'Glock Type' and resent the insinuation that I should keep my Glock in a 'non-firing' state as a safety feature.
Perhaps you should keep one of the tires off of your family sedan as a safety feature, can't have that old Ford rolling down the driveway and taking out the kiddies in case you forget to set the Emergency Brake.
As a responsible adult and firearm owner, I'm capable of deciding for myself whether or not to have a round chambered. In my case, if a gun is loaded, there is a round chambered. (FWIW, if the gun is not in my hand, it is in a holster with the trigger covered.)
I think a better analogy would be putting a fire extinguisher in a locked case, and putting the key in another room. Sure... it will keep the fire extinguisher from hurting anybody and being discharged accidentally if it fell out of the cabinet. But if you ever needed it in a hurry, would you want the flames to climb higher and higher while you fumbled for a key?
Gun access is even more important. Modern guns (good ones) do NOT fire unless you pull the trigger. Period. Especially Glocks. You could chamber a round and chuck it off a building onto concrete--it will not go off. If somebody appears in your house and runs for you, you have less than a second to save your life. Unless you've trained countless hours of racking and shooting, you will pull the trigger and it will go "click". Even if you've trained, the adrenalin rush makes you forget. A gun carried without a round chambered is almost worse than no gun at all!
"FWIW, if the gun is not in my hand, it is in a holster with the trigger covered..."
Ha! That is the key. I agree.