That is really surprisingly self-sabotaging. People in labor movements don't spout slogans like, "An injury to one is an injury to all" because we're trying to moralize.

It's because when workers at one company have their salaries suppressed - by collusion in hiring, by wage theft, by death-march management - the market rate for their labor goes down overall. When any one company can abuse its workers, we all lose from that injury to the labor market we all share, as well as from the lost productivity from sub-optimal allocation of labor.

Crossing a picket line is kind of a moral choice where you decide how much value you place on A) the success of that particular strike and B) ever having anything to do with those picketers again. It is weird to talk about in terms of tech, but nevertheless, if there is a union that represents you, ignoring a strike would probably not be free, it would just be a different kind of cost. Maybe how many numbers you get at the end of the day is the only value you care about. I think, beyond a certain minimum salary, regard for your impact on other humans becomes relevant to many of us in the choices we make. Or things like work environment or hours, which unions safeguard. Would you work in a less safe environment to make your take home number 5% bigger? Or, indeed, tolerate greater risk to somebody else for more pay for you? "The best deal" can be a lot of things.