This is one reason I'm especially interested in worker cooperatives.

You're right, people spend 8+ hours a day at work, strengthening business owners, who are essentially working against them. Then some small fraction of people have/take the time to learn about issues affecting them and volunteer a couple hours a week for their chosen cause.

Even those in a union are negotiating from the standpoint of "the company owns the equipment/processes/customers and we own our labor".

What if instead the workers also own the business? Now you're spending eight hours (or less) a day working on something that directly benefits you, and with which you're intimately familiar. It's possible to make democratic decisions because it's not some abstract issue or far away politician. And every successful worker cooperative reduces the money going to some micro-king, and in turn reduces the distorting effect of corporate money on our electoral system.