Why is it coercive to have to join a union to work somewhere? Work somewhere else. If that sounds coercive then so should having to work at tesla to begin with. I think wage labor is always a bit coercive but I don't see how having to join a union to work somewhere is worse. And it solves the free rider problem.
I agree with you in the case where a union was already in place when you joined. I'm talking about the situation where a new union is proposed in your current workplace.
> Work somewhere else.
You could equally say to any workers at Tesla who want to establish a union. Work somewhere else.