I wasn't going to respond to this but after reading the replies I thought I would shed some real light on the topic.
As all the vets & military types know, when you sign on the dotted line in the military, whether it's active duty, guard or reserve you are agreeing to all that goes with maintaining your ability to do the job the military assigns you. That includes, doing training, maintaining job qualifications and mobility requirements and it is a constant requirement. One of the primary mobility requirements is vaccinations. For current World Wide mobility there are probably 10 or more shots you are required to maintain, ie Yellow Fever, Tetanus, Typhoid and many others. When they made Covid vaccine mandatory it was just that, mandatory, the same as any other requirement to maintain current pay & attendance status. You must maintain all of these in order to stay in. If you fail to maintain any of these, you are subject to being released. I'm sure those 60K folks had ample opportunity to maintain the requirements. Life is full of choices.