Comment by andrewshadura

You are missing the point. The definition of free software focuses on the freedoms of the user, but these freedoms are not easy to verify against a specific software license. The practical aspect of the open source definition (which really is the Debian free software guidelines with the word Debian removed) is that it gives you a toolkit, ten criteria that a licence must fulfil to be considered free software. Importantly, when this definition was created, the alternative, the free software definition, was incomplete and lacked the freedom zero [0]. Even more importantly, that text apparently wasn’t widely known back then, and even Richard Stallman himself liked the DFSG as a definition of free software [1].

[0]: https://www.gnu.org/bulletins/bull1.txt

[1]: https://news.slashdot.org/comments.pl?sid=1129863&cid=268758...