> actual understanding of the pros and cons of union membership
Many of us have worked in $MEGACORPS with substantial union representation among the employees, have seen what it does and how it works in practice, and as a result want nothing to do with it. I wasn't represented due to my job classification, but now due to my firsthand exposure to unions I absolutely never will be by choice.
No way, no how, not ever.
Translated: Management ("wasn't represented due to job classification") doesn't like unions. Shocker.