But in the US they bargain on the enterprise level, not by sector. I think that was the implication in the comment.

https://en.wikipedia.org/wiki/Sectoral_collective_bargaining...

Exactly. And as far as I understand the closest thing to US "to unionize" is a to set up a "worker's council", which is actually mandatory for companies above a certain size.

From a European view it is strange that this is a big deal.