Maybe. But you can protect yourself just fine with a small handgun. If you think you need a little more than that, we can talk about it.
But full autos for schizophrenics? Bazookas for convicted felons. We would REALLY need to talk about that.
If you are a regular person, you should be able to have what you need to defend yourself if you feel like you really need to. Research, of course, shows that homes with guns in them are MORE likely, not less likely, to be broken into. And when they are, the homeowner brandishing firearms is MORE likely, not less likely, to be killed or injured. Those are the kind of findings that were coming out that caused the NRA to force congress to cut any further funding for research. But whatever. If you don't want to know the facts and you still want a firearm because you think you need it, that's fine. No one is out to stop you. But that's no reason to fight closing the loopholes, placing some rational limits on the kinds of weapons available to the public, etc... It doesn't have to be all or none.
It's like saying if you allow government to put up a traffic light at a busy intersection, it's a slippery slope to them coming and taking your car away. It's crazy. There have to be some limits.