I learned to hand hold a heavy camera and get sharp images while an Air Force photographer. Bit hard to have a tripod in the back seat of an F4 Phantom or F15 Eagle. Was a photographer in Vietnam and using a tripod was a quick way to get dead. Was shooting with Nikon FTNs with motor drives, usually had two of them as sometimes you could not change film as fast as you wanted (try changing film in a camera while being shot at). Military photographers had to learn good hand held techniques as the films of the day were not that fast and you were not going to get a second chance to get some actions.
There are techniques and methods that will enable you to shoot at lower speeds and still get tack sharp images. Most of the people I watch shooting hand held are not holding the camera correctly and using good technique. Same type of techniques and methods for shooting a rifle.
I try to use a tripod when I can, but at 77 years old, hiking up the hill above the high line with a tripod is not on my to do list.