Earlier quoted context omitted.
Indeed. They can also choose to unionize.
Sure, it's just not the only way like you implied.
What I "implied" was:
1. union benefits are redundant in worker owned-cooperative, not in typical corporations
2. and that's because corporate employers cannot emulate collective bargaining rights (but co-ops can)
Please, I'd really like you to explain to me how how "an employee can at any time choose to work somewhere else" emulates collective bargaining rights.