It has everything to do with genre!
I will very often take 15 minutes or more to set up a shot. I’ve spent hours in one general location finding the best spots to shoot, and then quickly moving from one spot to the next spot to the next–and then back to the first–during the few minutes that the sun is low on the horizon. For a landscape photographer, fps doesn’t mean much to me, and M is my closest companion.
It’s a totally different story when the subject is a moving element. You are doing it right. You are shooting like the pros when you jump into Tv, Av or even P. I use Av and keep the aperture as wide as possible when shooting action, letting the shutter speed fluctuate from 1/200th to 1/2000th depending on what the light is like where I am point the camera.
A pro knows his camera well enough to know when to use the automatic settings as much to his advantage as the manual ones.