Yeah, for me, a company having a union shouldn’t really have much of an effect if they are actually treating their employees well.
What wage discrepancies would there be to negotiate? Why would there be any arguing over allotted sick time? Why would an employee have a grievance against a company that they would need legal support for?
A company that truly wants to treat it’s employees well should already be on board with all of that stuff. In fact, I’d almost even argue that they should want a union.
Yeah, in the unlikely event I was ever in such a position, advocating my hypothetical employees to unionize for their own interests against mine (no matter how much I may try to cede or be considerate) seems like the bare minimum. Other options would maybe include making it a workers co-op or something.