@TexasObserver Clint Laidlaw, a philogenist and reptile expert on YouTube (Clint's Reptiles) stated in a video a couple of years ago that rattlesnakes were evolving to use their rattles less, because it kept them safer from humans. This, in turn makes them more dangerous as they don't give warning before being stepped on.
Practically no snake will chase a human (mambas might be an exception). And biting is usually their last resort. They will make sure you know they're there, then try to run or hide. They don't want to interact with us.
Something like 60% of all fatal rattlesnake bits happen to the faces of males between the ages of 16 and 25 who are heavily under the influence of alcohol... If you don't mess with them, any snake is practically harmless.