"Gun ownership should be prohibited for those without a valid reason" implies that you need a reason, which is not generally something we demand of people before we let them own things.
Most things don't make it easy to deliberately or accidentally kill people.
yes, I know? I'm not arguing against gun control, I'm saying that the sentence quoted by Art is meaningful and not a tautology
I would disagree. For most things, we simply agree that "I want it" is a perfectly valid reason.
I don't think people should not be allowed to buy ordinary things if they don't want them, either. Owning most things does not have a 'check the validity of reasons' step.
But this is kind of a tangent, the real reason that question is there is because people are more likely to say yes if they are in favour of gun control, independently of what you could precisely parse the phrasing to mean.