No, it's not like that at all. You are legally allowed to opt out of paying union dues.
Re:Kickstarter’s staff is unionizing
by chrisseaton on Tuesday March 19, 2019 @05:11PM
(#19435929)
So you'll pay 'fees' instead of 'dues'. Pretty meaningless difference isn't it?
If I never asked for the union or their collective bargaining, then yes. It's like cleaning my windows when I never asked you to and then demanding cash for it.