So you can cite disease and death from poor eating choices.No I can't. But I can site scores of examples of people I know personally who throughout their life time made fast food a staple of their dietary choices and who suffered from the aforementioned conditions you mentioned.
So let's try this once again. Can you site an example of the last newsworthy crime that was committed with a legally owned firearm please. Or even better some instance which you know personally
I can cite injuries and deaths from guns.
It sounds like a comparable situation.
If you want to bring in "responsible" gun owners, I can bring in "responsible" eaters. Once again, they are comparable situations.
So either ban both because of irresponsible people or ban neither because of responsible people.
But you cannot say ban fast food because there are some irresponsible eaters and some responsible eaters but don't ban guns because there are some irresponsible owners and some responsible owners. That is irrational.