I think it's more to do with that if the collective workers vote to become a union or not, and succeeds in that vote, then the owner/company must recognize them as the union and engage in negotiations as such.
If the vote of the workers fails to choose to unionize...well usually that means the people who tried to organize it get fired because there's no union
Only Denuvo has reported that it's better for sales, the rest of us don't have data on that and I'm not trusting the wolf with Hen House design