>If unions are so great, then they should stand on their own 2 feet, instead of forcing everyone to join them.
If you can convince enough people, you can? But if people organize against you, be a good loser. Nobody except the very hardcore is saying:
>If private property is so great, then everyone who wants to have it should stand on their own 2 feet, instead of forcing everyone to accomodate them
to argue against private property or capitalism. But the same social contract that allows for private property can decide that if you want to have its benefits (e.g. the aforementioned private property) can recognize and protect the hard won rights of unions and workers. Stealing a bit of rhetoric, those who don't like it can go to some warlord ridden backwater, I hear there you are free to not follow any social contract if you are up to it