Honestly at the range I don't see many pivoting like crazy swings.Most are flat footed all arms and hands swings like the one above.I totally disagree that the swing above is "pivoting like crazy".There is virtually no pivot until after impact.The reason he looks like that in the follow through is absolutely zero lateral movement.In fact he has backward lateral movement.
It's not exactly easy to pivot like crazy swinging a club.Ask our own Mike Finney who describes his swing as pivoting like crazy with the hands doing nothing but holding on for dear life.We should all be lucky to swing like he does.