This is a stretch. Gov't is helpful in protecting us from coersion and force.
How do you know gun laws would have meant no gun in the house? What about hunters? There could have been a rifle in the house. What about a crowbar from the garage? How about a knife from the kitchen?
I don't think you have taken much time to think about this. This has been hashed out dozens of times on this board already, so I am not going to waste too much time. Pot and other arbitrarily selected substances are illegal. How hard are they to get? What kind of citizen is more likely to aquire illegal goods? What type of citizen is more likely to profit from the sale of illegal goods?
Just to recap:
Will making guns illegal make them much harder to get?
Who is more likely to obtain guns by illegal means and profit from the sale of illegal guns? Law abiding citizens or criminals we need protection from?
Where does it stop? All guns? I hunt to put food on the table and for enjoyment. What right does anyone have to take my guns away? How about bow and arrows? swords? Spears? Ice picks? Implements to start a fire? Hammers? Nail guns? Baseball bats? Steel toed boots? A car that could be used to run someone over?
You are going to have to tell us what should be illegal and why other devises use to harm others are not on that list.