Back when DSLR's were taking over from film, I bought a DSLR and took a photography course. The instructor said that the rules for digital photography are the same for film: the photographer's first job is to expose properly. He made us do it the manual way - camera in manual mode, and exposure with a light meter and an 18% grey card. He said that cameras aren't as smart as you. There are situations where auto-exposure might be fooled, and your only recourse is to expose manually.
He was right 25 years ago. These days cameras are much smarter. Even my phone can expose properly, let alone proper photography equipment. I know how to look for a midtone and set my exposure to that using central metering. But it's much easier to stick my camera in Aperture Priority and not worry about it. There are times I will put it in full manual though, mostly when I am shooting in marginal light situations.