And the union technically has no obligations to them either, despite them having to pay the fees.
The union has an obligation to negotiate contracts which cover all fee payers.
You might not be required to strike when they do, but given the violence that unions in the USA are willing to do during strikes to people, union or not, who still go to work, plus what's it like when a huge portion of the other workers are gone...
The vast majority of strikes are entirely nonviolent, even in the US.
If you're paying 90-100% of the dues to the union already, why NOT be a member? Even if you're not "required" to strike, unlike them, if a strike does happen and you can't work, you're not going to be paid by the union for not working, you don't get a vote in whether to strike or not, etc... At that point, you might as well be part of the union. The difference is a lot like me being allowed to drop "under god" in the pledge of allegiance.
"Can't work?" I imagine your employer will be very happy to have you continue working while many of your coworkers are standing outside with picket signs like petulant children.
Do you happen to have a citation on this? That being a "fair share fee payer" and thus working union positions is even an option?
Citations:
https://en.wikipedia.org/wiki/...
https://www.sagaftra.org/finan...