Is the Post Industrial Economy So Harder to Unionize?

Labour unions are less central to a lot of our societies in the west than they used to be. That often uted to the decline of the industrial economy. But i don't know, for me, why exactly is the post industrial economy so much harder to unionize? Is there something about manufacturing jobs that makes them easier to unionize than service jobs? Ye, there's a sort of superficial logic here, isn't there? Which which says, well, y, or you'd think so, obviously, right?"