This is clearly what you believe your reaction would be, but why universalize it?
Put another way: do you think everyone would react this way? Probably not, right? So the question then is why you think this particular character would. The fact that you don't find it personally convincing is a perfectly reasonable thing to say, but it's not, by itself, reason enough to say that the film is objectively inconsistent or lacks logic.
Why doesn't it show him that? At minimum, it shows him how easily they can be hijacked and misused. He's a lot more protected and capable than most of the people the weapons put at risk, so he can reasonably infer from his experience that it's happening in other cases.
Sure it does, in the very actions you're questioning. You're simultaneously saying that him doing these things doesn't make sense, but then also excluding those things as possible evidence for the film "saying" these things.
And the movie puts a big, glowing exclamation point on the idea in the final line, where he decides to come out and say he's Iron Man. It's pretty elegant, actually; he starts off impersonally stamping his name on bombs and not caring where they go, and he ends giving a name to the weapon he, personally, has become, for everyone to see.
And the movie puts a big, glowing exclamation point on the idea in the final line, where he decides to come out and say he's Iron Man. It's pretty elegant, actually; he starts off impersonally stamping his name on bombs and not caring where they go, and he ends giving a name to the weapon he, personally, has become, for everyone to see.