Meh. I had to get a bunch for Afghanistan, so that take doesn’t impress me. And it absolutely was effective, as seen in ICU numbers and the relative proportion of who was ending up there. Obviously not 100%, and obviously this virus has had the ability to escape immunity to some considerable degree. None of which invalidates the legitimacy of the policy requirements at the time they were made and enforced. Nobody forced any troops to take a vaccine, it was simply a choice they had to make that would have employability consequences.
Anyway, this has been hashed out here many times over. Troops chose the behaviour, they chose the consequences, and they were very informed as to what that would be. I recall at least that when I was in, your own preferences and wants did not take precedence over the operational requirements of the service. I didn’t think I got out long enough ago for that to have changed.