Hey Toni

Its great to hear from you & I hope you are well!

I agree with you for the most part but I still think there is a place for everything. Being an 'exercise' professional for 30 years has taught me that no 'exercise or movement' is controversial IF it's appropriate for the desired goal, the individuals biomechanics and tissue tolerance. Movement isn't always safe or perfect when you consider olympic lifting or gymnastics and yet they are beautiful to watch. 
So I think as long as we accept each individual body, work bespokely with that body and assist with creating clear sensible SMART goals we can only be limited by our imagination!
However with your population of clients (older adults) it can literally be about movement quality and FEELING like they move well, nimbly or with haste. Then of course reps and sets maybe less enticing. In fact time under tension (TUT) I have found to be great for loading more safely with this demographic. 

Rach

x