The political goal was to give users absolute control over their computational environments. In reality, we have less and less control, because computations moved to the cloud (corporation-controlled servers) and the most used devices regressed to a non-hackable state (mobile gadgets).
Even if you use a Linux desktop with 100% open source software, you will still probably do a good part (and the most sensitive part) of your computations on someone else's computer, that you do not control. Open Source ended up making it easier for companies to build this new world, because it provided them with perhaps billions of man-hours of free effort.
The strategy of Open Source as a political movements made sense in the 1990s, but we need something new for 2019...