You aren’t simply going to accept any offer, you are going to negotiate a fair one thanks to the intelligence you obtain from not-union.

Without leverage that comes from collective bargaining, how does the intelligence change your negotiating position?

It’s not about extortion, it’s about fair deal. The knowledge is useful as market research, in a similar way knowing rent prices in the neighborhood when renting.

In the current situation, companies have access to this and employees don’t.

Characterizing collective bargaining as extortion is part of the problem.