I don't think we can conclude the bolded. There's a lot of uncertainty sometimes in these medical situations, and so the docs often have to resort to probabilities. The Celtics initially medical staff felt that surgery wasn't necessary, which was probably the right call to make at the time, given the information they had at the time. Starting with a conservative, non-surgical approach is often the right call. After the knee failed to respond, there is now a lot more info available to the docs. Here is what we don't know:
Would the Celtics medical staff have eventually recommended the same surgery? Did Kyrie consult the C's medical staff again after the knee failed to respond, or did he go right to his own doctor? Did the C's doctors recommend a second opinion? Did the Celtics tell Kyrie that while they disagree, they would support whatever decision Kyrie made if he got a second opinion?
There's a lot of stuff that we don't know, and I'm skeptical the guy on the podcast knows any more. Given that, anything is just speculation buy a guy that is trying to make a mountain out what is really a molehill.