Am I the only one who sees some of these laws as lacking common sense?

Ok, so if you need an inhaler, you have to get a doctor to prescribe it because it can be used for some illegal use.
Some over the counter medications are even kept track off and you can only buy it directly from a pharmacist.
There are jobs out there that require people to get a psychological evaluation test if they must carry a gun or some weapon, or even when working with children. But regular Joe, down the street can go and purchase an automatic rifle and 6000 bullets but the public is suppose to trust that all gun holders are sane! But in the meantime, little Mary with severe asthma who just ran out of her medication and is broke, is suppose to see a doctor before getting her life saving medicine.
Why does it make sense that we protect the rights of gun nuts and yet not protect precious lives?