It sounds like sporting clays are different experiences at different courses. In my neck of the woods, only one shooter is on the line at at time. They have a steel frame "window" at each presentation that your barrels must be inside before calling for the birds or firing off a practice shot. This means that your spent shells don't interfere with anybody else's shooting no matter how far they fly. I do agree that we a need to consider our shooting partners no matter what the type of hunting or sport shooting we engage in.
This is an interesting thread, though, in the sense that I find myself in agreement with all of the posts so far.
I would like to add that comfort with a particular type of action is a muscle memory exercise. I started out with a single shot. Then, I inherited a pump and became proficient with it. When I switched to break actions later on, I was clumsy at first, but I became more and more instinctive with each use. At about this time, my hunting partner and I started collecting firearms of all sorts. It was almost inevitable that we would want to experience hunting with a variety of them. For a few seasons during this period, we tried to set the record for most different guns used to bag upland birds in a single season. It got to the point where we would change guns several times a day.
I'll say it so you don't have to - that was extreme. But, it was a phase we went through and it was nothing but fun. The point of this rambling tale is that now I can pick up pretty much any shotgun, cycle it smoothly, and hit what I'm shooting at.
I encourage you to try shooting sporting clays with a pump. The worst that can happen is you'll suck at it and want to try something else. The least that can happen is you'll gain some experience.