I’d like to think you’re right, but the employer in the Houston hospital suit just got a federal judge to rule that they are within their rights to require the serum. I suspect a few more rulings like that will put an end to all legal challenges.
The lawsuit is not to STOP the requirement but to hold the employer LIABLE for adverse effects. The manufacturer is held harmless but not the enforcers of any vaccine mandate. OSHA has maintained this stance but I know of no legal challenges to it.
That Federal judge is one of the most-overturned in the whole 5th Circuit.