Yep, if people want something bad enough they'll get it, but like ice for example, we would have a much worse problem if we didn't actually do anything about it and let circulation just run amok.
Less guns = more cost to obtain them = harder for basic thugs to get hold of them. Economies of scale alone will curb the problem massively. The guy who sold the gun to the Orlando shooter, his attitude was "I just sold him the gun, if he didn't buy from me he would have bought from another store" - and that's the problem in a nutshell. Versus having to go to lengths to get a decent gun, he might have rethought his plan, or having to settle for something he had to cock for every shot, so a lot less lives might have been taken or this guy could have been tackled after only getting off a few shots.
America will never see it this way though. Too many there are obsessed with a culture, tradition and hundreds year old constitution that was first written when guns couldn't accurately kill at more than 15 metres and when the biggest threat to national security was indeed a foot soldier. Now this culture is just a burden to their own homeland security and does little in the way to scare off any real threat to them - think Russia or NK could give a stuff about Bobby Ray and his AR15 assault rifle hahaha