I personally think FOSS software is a fine thing, while not being overly fond of the GPL.
If you allegedly "give" me something for "free", but still assert the right to tell me what I can do with it afterward, it's not "free" in either sense of the word. It's not "free as in beer", nor is "free as in freedom".
Stallman's monomania on this subject became tedious and counterproductive decades ago.
Yes, he wrote some great software. So did dozens of others.