Our tools are an extension of us as humans. When someone else is in control of those tools, it is alienating.
Modern software is built to make us not masters of our own tools. Like your hand sometimes works for a corporation against your will. I guess that same pattern is also called a job. But the worst kind of job. The one you do without choice.
A happier future is one with humans in control over their own tools and their own livelihoods. That's software with the user's choice at the center and independent work that connects us to eachother by being in genuine service to one another.
I think this manifesto is getting to this idea but from a different angle.
It's the extractive rent seeking monopoly playbook that seeks to undermine it. Only in captive, monopolized markets are companies able to force the use of tools we don't control.