Plausible deniability. He had no choice to release the vaccines early and in order to survive the fallout of them almost certainly trying to pin it all on him, he must follow through. It's the only logical path forward for him. He didn't put the toxic shit in the vaccines. That's on the medical industrial complex. He did what he had to do to stop the great reset with the shut downs they had hinged on " vaccine development."

Also keep in mind that half or more of his followers never took and never will take the vaccines. Despite his coaxing. The people that took it were going to take it regardless of what Trump said because they were coerced with fear. Nothing Trump said was going to stop these people from taking it just like the lefts hatred for Trump didn't stop them from taking it numerous times despite Trump's support for it.