Here is the thing.
Trump KNOWS his audience doesn't want the vaccine and will think for themselves.
The fact that he said get it and the crowd booed about it!
Think of how POWERFUL that is guys. Not even Trump himself can get us to take the vaccine.
That sends a LOUD message to the deep state.
I honestly think Trump did this on purpose. If here is one thing the guy knows. He knows his audience and what to say.
I like this explanation. I also think that he was threatened that if he says the vaccine is dangerous they will 9/11 us just like I believe they did on January 6. So along with what you said it is malicious compliance. "GET THE VACCINE!. Oh no that's ok you have your freedom." Doesn't get upset at the booing.