Thank you Charlotte Bell for this article. I regularly encourage my flexible students to practice “containment;” they don’t need to become more flexible for all the reasons you cite….http://www.elephantjournal.com/2013/09/yogis-be-careful-with-your-joints-charlotte-bell/
And, for older yogis, strength and balance are the key. Sure flexibility is important to stay supple and moving, but the other two bring stability, confidence and fearlessness. The triumvirate keep us vital in our practice in our lives.