I'd like you do give away 100% of your salary, ok?
Are you greedy if you say no?
The hyperbole about being forced to work for free isn't entirely wrong, because tech companies love tricking people into doing free labor for them. They also aren't arguing for AI being a copyright-free zone. They're arguing for reallocation of ownership from authors to themselves, in the same way that record labels and publishers already did in decades prior.
[0] At least until the Luddite Solidarity Union Robot Uprising of 2063