Nonsense. Adobe, Apple, Google, Intel, Intuit, Pixar, Lucasfilm and eBay all colluded with each other to keep tech worker compensation below its market rate[1].
Good luck negotiating a group health plan that an employer buys as a single employee.
> Given all that I personally think the downsides of unions in tech would be much higher than the upsides.
I would rather go with the facts, and not how you in particular feel about the issue.
The facts are that white collar employees that are union members have higher pay[2], better benefits, more time off, and report higher life satisfaction[3] compared to their non-union peers.
[1] https://en.wikipedia.org/wiki/High-Tech_Employee_Antitrust_L...
[2] https://www.bls.gov/opub/mlr/2013/04/art2full.pdf
[3] https://journals.sagepub.com/doi/10.1177/0160449X16643321