> Instead of going on strike, it would in my opinion be a better idea for the tech workers to look for a better paid job in an industry with higher margins.
If they alternative is quiting, than they don't have very much to lose by going on strike.
That's only true if you are guaranteed to find another job that pays at least as much as that one you are striking against before running out of savings money, otherwise it's always best to look for career movements while still employed.
If I were looking for jobs, I wouldn't want it on my resumé that I came from a company whose workers just voted to strike - even if I wasn't a member of the union. I would not want it to be assumed that I might be a troublemaker in a not great job market.
If they alternative is quiting, than they don't have very much to lose by going on strike.