Don't take issue about the need to take lessons from qualified coaches. However, do disagree about it being a waste of time to want to learn about the technical aspects of what is going on.
Hard shot, easy shot, makes a difference for sure. At some point, after the carry down, most shots get difficult. Some more than others.
The more you understand about your equipment and what is going on with the lanes, all things being equal, the better you can adjust, play and score.
--------------------
Those that can do. Those that can't complain. Pimpin ain't easy, but it's mandatory.
Most things we like, we don't need. Most things we need, we don't like. Don't confuse your likes with your needs.