Yes, there seems to be some debate about the stretching issue. All I know is I was not stretching before running per the new army excercise manual. And I tore my Achilles, the Air Force Surgeon asked if I stretched properly before, I reminded him of the new policy. He was flaburgasted and says tha is terrible and he can't believe PT guys are preaching this. He seems to think it applies to less fit /active people who do not have as much strength to protect joints.
PT should me how to work many of the small muscles in my feet to prevent the tendonitis. So yes if you can revisit the therapist or a Dr. perhaps you can get some good advice.