The not understanding often comes from a misunderstanding what a camera manual is. A camera manual assumes that the user knows what aperture, shutter speed and ISO are and how they interact. So, the manual is using these terms in order to explain the camera functions and buttons, but does not explain them. And there it goes wrong for many guests. It feels like reading Chinese.
To avoid that just look up the photography terms on the Internet, to understand what they are about and then enjoy the manual.
Depending on what kind of photography you do the most, have your default settings you go back to when you had to change them. From there start again to adjust to the new circumstances. Otherwise you might miss great photo opportunities.
There is plenty of photography advice available on the Internet including camera settings for several photography situations. Now people look up the settings and start photographing with it, wondering why only a few photographs are good and the rest is not. The answer is simple. The light determines the camera settings and the light is everywhere different and changing by the moment. One got to connect with the light and always keep communicating with it in order to get great images.
One of the biggest disadvantages of photographing on automatic settings is, that the function “choice of focus point” is not available. On wildlife photography courses, team building photographic safaris and photographic safaris working with the focus points is essential and practiced a lot. Imagine a lion lying in the grass. The automatic setting will focus on the grass and not on the face of the lion. To get it right you need to choose the focus point yourself and set it on the face of the lion. It needs also some practicing to get used to choose the focus points quickly, but once you got the routine, you will see your photography improving.
Taking photos on photographic safaris, team building photographic safaris, wildlife photography courses and any other occasions or trips require physical efforts of the photographer. Just standing there or even pressing a remote is not enough. Only by getting physically active really involves the photographer in the shoot. Move around to find the right position for the shoot or walk around the subject to find the right angle. Don’t be nailed to the ground, be flexible and active.