If people were considering voluntarily giving the Koch brothers or Tobacco companies union-like powers over their lives ("mandatory smoke breaks and maga hats for all!"), then I'd be expressing similar concerns.
Then if was you I would express similar concerns because the Koch brothers and powerful economic players in general have by definition way more power over political decisions - or non decisions - and our lives than the unions. Unions are merely a weak counter power.
I'm not even making a negative jugement here, this is just how power works.