You seem to A) Over estimate the power of a closed door and B) underestimate how desperate and powerful a drug addict can be.
So you're saying you should not lock your doors because doors can not stop everything?
Do you really think someone high on the wonders of modern chemistry is going to be stopped by a locked door?
Yes. All you need is a proper door. Oh, and not leave it unlocked.
More effective alternatives? Like doors and door locks? Yeah, I'm sure criminals have never found ways around those. Regardless, we all have doors with locks. But short of building your house out of concrete and using thick steel vault doors and having no windows, you'll only get minimal protection.
So your argument against locked doors is that there are cases where the door failed? I'm sure there are countless cases where carrying a gun did not help, does that make carrying a gun pointless as well?
"Minimal protection" is bullshit. "Minimal protection" is leaving your doors open and praying to the Baby Jesus that nobody will hurt you. Locking a bad door will keep many baddies outside. Locking a good door will keep all non-professional baddies outside. No offense, but I'd say your gun is rather useless against professional baddies. All the baddies that may have been stopped by your gun already were kept outside by a good, locked door.
Obviously they're going to run, it is their job to keep the client safe, voluntarily getting into a firefight defeats that purpose. The guns are there for when all else fails, for when they're cornered into a situation where they can't turn tail and flee. Which is what a lot of us are talking about in this thread.
A lot of what
I am talking about in this thread is avoiding those situations. See doors, a good door will avoid having baddies in your house. See armoured cars, an armoured car will avoid you getting shot in your car or getting carjacked. A gun can not avoid those situations. Quite to the contrary, adding a gun to both sides just makes the situation worse.
If you wake up in the middle of the night, half naked and half asleep, hearing people in your house. Running for your life is certainly an option, but it's not always practical, especially if you live on the 3rd floor of an apartment building and the criminals are between you and the only exit. Even if you do own a gun though, chances are you're going to do your best to avoid a firefight. Lock your bedroom door and call the police. According to criminals, the worst thing you could hear while committing a crime isn't a scared voice saying the police are coming. Nope, it's the sound of a shotgun cambering a round. They are not going to go through that door after hearing that sound, armed or not. ...unless they're suicidal.
Let's expand that example - baddie enters your bed room, you wake up. If you have a gun it is too late. If you have a good locked door the baddie would likely not have entered your house in the first place.
Your hypotheticals about no one having guns are not very useful in the real world, here at least.
They're not hypotheticals, I don't know anyone in person who ever had the need for a gun in their private life. Except for my grampa, but the only thing seeing the wrong end of his rifle are deer. In every day life they're locked away, and the safe is heavily bolted to the house just as our laws require.