Yes, you are free to care about whether or not skills are developed for yourself, but why care about someone else's skills, and whether they are developed or not?
Everyone is different, we all come in different shapes, and sizes. We all grow old, and for me, my elbows are shot (nerve damage), so there's things I do to avoid the pain and further damage. If I choose to use a piece of gear to make up for my physical limitations, who are you to decide what is best for me, works me, and what I need to avoid?
Face it, no one here is ever going to agree on what should be allowed or disallowed. If you want to look at it from a different perspective, then we should stop using bipods and bags all together, as they are a piece of equipment that aids your shooting, some could say is a crutch, and you could use the same argument that it takes away certain skills. Agree or disagree, everyone needs to face reality.