Because MURICA. I was explaining to someone on youtube about how hard the government and the law goes to regulate cars and driving (most of the time). If a new threat appears (such as texting and driving), they are quick to enact laws to keep people safe. They will quickly swipe away someone's right to drive for the smallest offenses. They make up the dumbest excuses to get into peoples cars and check it out... but when it comes to guns, there's nothing. There are rarely any attempts to pass new legislation to make guns safer for our country, and safer options such as 'smart guns' are shot down by big money interests forrrr reasons I don't understand (other than it'd get in the way of profit)
Our country would be safer with NO guns, but it would also be safer with just LESS guns. At least when you up the regulations so this crazy Orlando dude doesn't get them, you'll have a much easier time putting some charges on him or tracking his illegal activities rather than having to sit on your butt and do nothing because he's managed to do everything legally up until the point that he killed dozens of people.
If you are qualified to get a gun and you want a gun, waiting a little bit (24-48 hour wait period) or going through a process shouldn't be a big deal.
Supposedly we have the NSA that's supposed to be able to catch criminals doing illegal things such as buying guns and other black market activities, but they're too busy listening in on phone sex.