It makes an odd sort of sense to me. Airplanes are something that have been used as a huge weapon, and are easy to control. I also believe that there are wait lists and hoops to jump through if one wanted to buy guns or explosives, and that while they may be able to attempt to purchase gun, they may not ever actually be able to obtain them legally.
Of course, they may still be able to obtain guns/explosives illegally or even fly under another name.
I also agree that those lists are incredibly long and bloated, and I don't think that a lot of those folks are guilty of anything.
Let's remember that this is a heated topic, for sure, and to be respectful of one another when posting.