Some laws, like the ones against murder, are in place because we have a specific behavior we find immoral, and we wish to outlaw that. The laws are a means to their own end.Daverson said:Or is your point simply that some people break laws? In which case, one could just as easily say "Welp, laws against murder aren't doing anything to stem the tide of murders, might as well legalize murder". I'd strongly recommend against that line of thought, because frankly, that's just dumb.
Other laws, like stopping at a red light, are there for a secondary reason; we think that putting stop lights on certain intersections will save lives, or help traffic flow smoothly. A law outright banning right-on-red accomplishes neither of those goals, so such a law should be removed.
Most people who support gun control do so because they feel that it will save lives by reducing the homicide rate. If gun control does not accomplish this aim, then there's no good reason for the law to be in place. So far, the statistics show this to be the case; in the US guns are used many times more often for defense than for crime, and there is no evidence showing a reduction in homicide rate with laws that restrict ownership or use of firearms.