Actually it's the opposite, the violence and harshness of the wild west was overly exaggerated in the movies, turned into a myth. Modern age is much more violent than old west ever was.
http://www.fee.org/the_freeman/detail/the-non-existent-frontier-bank-robbery/
Put generally, we found the western bank-robbery scene to be a myth. Yes, a handful of robberies occurred. In the roughly 40 years, spread across these 15 states, we identified three or four definite ones; and in subsequent correspondence with academics anxious to help us “clarify the record,” perhaps two or three others were pointed out. We missed two “biggies,” both by Butch Cassidy and the Sundance Kid (including the famous Telluride robbery in the late 1890s). Still, the record is shockingly clear: there are more bank robberies in modern-day Dayton, Ohio, in a year than there were in the entire Old West in a decade, perhaps in the entire frontier period!
The shootout at OK Corral had 3 fatal victims. Compare that to the random shootings the west gets nowadays.
I don't see what bank robberies circa now when there's more people, banks, and the means to get to banks than ever has to do with the overall level of violence in America during that era, much less bank robberies of that era (when there were less people, banks, and the means to get to them...).
The West could be gruesome as fuck with absolute capacity for the sort of barbarism that makes most Americans uncomfortable, the land being generally lawless in parts and a literal
warzone at times. Some people think the notion of a violent, developing America is a myth, but I've noticed these types of thinking rarely look beyond the "famous" incidents of violence, like big gunfights or, as just mentioned, bank robberies. They're not necessarily wrong, either. Notions of anarchic mining towns or gunslingers battling at dawn are overblown. Most developing cities introduced work to look after, and a sense of togetherness required to do said work. They also had way more women and children which introduces a feminine quality that tends to depress violence. (Who takes their family to California only to brawl it up at the bar and get themselves killed?)
Elements like lawlessness, tons of land to fight over, droves of veterans from devastating wars, new immigrants, emancipated blacks, and neighboring natives can make for plenty of murder and mayhem. It just depends on where you're at. When people say the West is violent, they're really talking about places like West Texas, an extremely harsh land of ultra-violent natives, Mexicans, and the sort of fucked-in-the-head settlers that had the brass balls to enter the territory in the first place. When they argue it wasn't
that bad, they're talking about places where civility was required and appropriately sought. And the thing is, places like the south or midwest were just as bad at some points in time. Places like deep Louisiana where there's nothing but pinewood and swamps, what do you think was happening out there? Peace and harmony? During wars, immigration, and the flushing of native populations? I remember reading about early 1800s-Georgia and surrounding backwater areas being crime-ridden shitholes. They just don't get glamorized or talked about much because there's no mythology there. What we see on the macro-level are definitely strong hints of outright insanity - massacres, tiny towns being burned, children murdered, scalpings, massed hangings, torture, gang violence, etc. It's not hard to extrapolate what might have been happening at a micro-level where there were no journalists or police to watch things. The closest thing I can think of today is shitholes like inner-city Detroit, south Dallas, northeast St. Louis, the decayed areas of New Orleans, etc. Places where sometimes police don't even go and the violence is so repetitive it barely makes a blip on the news. The room for violence is fairly large and many times it is filled. Plain as day. Because resources are scarce, and people are dumb. Throw in a bunch of other elements like war strife, immigrants, natives, etc., and you got a nice cocktail of nastiness.