Earlier quoted context omitted.
Being pro-employee does not necessarily mean being pro-union.
Technically no, but practically it does, so long as massive corporations exist. I think you can argue that with smaller scale business you can work to better employee conditions without collective action, but given the power and resources that a corporation can bring to bear it's hard to imagine effective bettering of employee conditions without collective action.
That's an interesting assertion that you seem to be accepting as universally axiomatic.
(... or perhaps, a self-referential definition. Maybe a company isn't "massive" until one observes behaviors that suggest the company is purposefully acting counter to employee quality-of-life wishes?)