Platitudes won't either. People in true need of a union need actual support. Where
you spend your money, who you financially support in politics. They are not on the sidelines cheering the Bandcamp engineers on, they see it for what it is, and know it isn't going to trickle down to them.
Forming a union isn’t a platitude, it’s direct action. In a culture as union-hostile as the modern day US, every new union is a win for the labor movement.
I can speak from experience that leftist groups who otherwise hate the tech industry do celebrate tech unions.
Unions have won every cultural battle in the US. The only reason union membership declined is that virtually every industry that they got a hold of went bankrupt or severely contracted. A notable exception is Hollywood, and that's only because the nature of movie projects, which are time-limited, reduces the leverage of unionized workers.
In the government, where taxpayers pay for growing inefficiency, unions have only grown in strength.
I don't think it actually, meaningfully diminishes "actual labor struggles". The working class is not going to have a harder time organizing because some tech workers did it first.