Of course U.S. cities are considered highly dangerous throughout most of Europe and Japan. Since here in the U.S. we have the highest murder rate among the 29 industrial democracies it may not alarm us too much that Mexico is also unsafe, but I prefer to travel to places I can relax without worry of bodily harm. Washington, D.C. and Miami are notorious examples of cities with a high murder and crime rate and tourists from Europe and Japan are warned about this before they travel to those cities. I believe that the U.S. State Dept. issues travel warnings about unsafe travel destinations abroad. Yes, the U.S. State Department does have a Web site with travel advisories for tourists.
High quality is available in USA, but the prices are high, and it's hard to find.
High quality European style work is half price for me. Best cleanings ever. No rush or compromise. Most of my fellow patients travel from Europe for their dental tourism. After 55 years with US dentists, in many states, I have met no equal.