In Hollywood they have SAG (Screen Actors Guild) so a large union for high paying jobs isn't unheard of in America.
*Note that support/opposition to Unions is often form from petty core experiences (first hand and family relations). For me it is a contest between a 2 minute promotional video, three years of my professional life, and 25 years of my uncle's work experience. Given these forces, you would be pretty hard pressed to change my thoughts on the matter in the abstract (particulars are what matter here).
The 'American Factory' documentary has a great example of what this looks like in real life. Hearing that Amazon or Google or whoever else worked to convince employees to vote against unionizing is one thing, seeing what that effort is like on the ground is altogether more eye-opening.