WGA west has about 10k members, whole US has about 15k. (This is from Google, please correct me if I got the wrong number.) By contrast, there are over a million people building software. Will this model scale up two orders of magnitude?
Given that “the market” seems to have settled on LC as the only measure of skill I don’t think it’s far fetched to imagine that a guild system could be better.
That’s not true and I suspect you know it.
However, just because you’re in the guild does not mean you have a job. Productions still have to hire and choose to work with you. Generally, if you don’t get work within sometime between 1-2 years you lose membership.
If you’re not “skilled enough” for the minimum floor pay, then the studio or show has no obligation to hire you. Don’t see why that model can’t work for tech?
(edited to add: Obviously the UFCW is not the type of prestige guild the WGA is. Unionizing probably isn't always the best solution, but some amount of work in tech -- QA for example (https://www.theverge.com/2022/12/2/23489932/activision-blizz...) -- could be unionized under that type of system, while other employees become members of more powerful guilds that command higher salaries.)