Ben, there are some people that want to reinvent the wheel, to conform to what they believe.Understood. I hope you also understand that letting your personal opinions hold sway over the way you approach a subject can mitigate strongly against achieving competence.
In the instant case, your personal opinions simply don't matter. If you want to be a competent LTC instructor, you have to understand the use cases for and be minimally competent with revolvers. Period. Personal opinion can dictate what equipment you use for your own purposes but it can't change the fact that an LTC instructor who doesn't know his or her way around revolvers is not competent to be an LTC instructor. As the smallest of examples and again in the instant case, when you're teaching LTC classes sometime in the future and you have students show up with 5-shot revolvers, you have to appreciate how that will impact the way you run the firing line.
I don't know you so this isn't directed at you personally. Don't take it that way. But in my experience, one easy way to tell the difference between a high-speed, low-drag poser and a competent pistol instructor is to hand them a revolver and watch them use it.