All those sorts of protections seem like they make sense for every worker rather than being "tech" specific. I do understand that collective bargaining could help with carving out sector-specific deals, though.

I wonder if there is a difference in context that explains why we might disagree. I'm in Australia where I think it's politically easier to "add" broad top level protections for all workers than it would be in the US.

Yeah, the legal framework (Taft-Hartley) in the US is pretty explicit about banning general strikes and solidarity strikes. A union can organize within a single industry but not beyond that.