> Strikes are definitely ultimatums, though they generally have clearer objectives, and are usually preceded by a series of discussions. Strikes are not conducive to good relationships.

You do know that frequently the only reason these "discussions" are able to be had is because of the threat of a strike? What if the GP had these "discussions" and was told to go back to their desk and STFU? Then what?

Strikes are actually the result of employers abusing employees, which is what creates the bad relationships. You sound as though you believe the other way around, that strikes create bad relationships.