Woulda' Coulda' Shoulda'...
But they didn't.
Union organizing attempts in that sector were always clumsy grifting operations which never succeeded, because they offered nothing of value to their prospective members. That is still true today.
In particular, they would not and will not address the H1B issue. It was always about collecting union dues and restricting younger people from entering the STEM jobs. A deal for the older guys, but not good enough for them to sign up in sufficient numbers.
Doctors and nurses unionize now while you can!! You are being going to be replaced!!!! Don't let what happened to IT workers happen to you!!!