Ubuntu "took off" not because it was very good or very easy. Ubuntu "took off" because of ShipIt, i.e. because of a multi-millionaire subsidising its mass distribution (at a personal cost).
In a healthy company, the CEO and CFO would get sacked on the spot for doing so. But IBM is not a healthy company, it's just a sick cow being milked to death.
"Considering Stallman worked in the MIT AI lab in the era of symbolic AI, and has written GCC (an optimizing compiler is a kind of symbolic reasoner imo), I think he has a deeper understanding of the question than most famous people in tech."