But nothing forces Disney to continue to fund this studio, or for other companies to give them VFX work to do. The reason for poor conditions in the VFX industry is always identified as the fact that, put bluntly, they are willing to take it to work on movies. No different to video games or other artistic endeavours. Until the field stops being fashionable enough for people to compete so aggressively, conditions won't improve and unions can't fix that.
Then how can Starbucks, Chipotle etc. blatantly shut down stores in response to unionization?
I believe they tend to take action before a formal vote is held, which gives them plausible deniability.
Then it seems really easy to avoid?
The regulatory authority has changed it's interpretation of the rules recently.