Everything is political. Politics have been heavily intertwined with work forever. The history of unions is intertwined with literal government violence.
Negotiations for compensation is like the least life-impacting thing a union can do. Tech workers are well paid and capable of negotiating.
Things like work hours, quality of life, paid leaves, etc are important and can’t really be negotiated by the individual. Every labor victory from yesterday is the status quo but every future one is politics.
OK, but that doesn't answer the concern of the person you're responding to. They're just not going to join. It's a common objection!