Some bad actor employers or supervisors may exert pressure upon the employee to not leave that day. There's a great many methods to force people to do something

Some bad actor employers or supervisors may exert pressure upon the employee to not leave that day. There's a great many methods to force people to do something yet still stay within the word of a given law. Especially in those states that have the "at will" employment law, because you could be fired for sneezing incorrectly and have no legal recourse. That, of course, is another subject for another day.