The "spirit" of FOSS licences the various sorts of ideas that lead to the GNU project and the FSF in the 80s, and all that user-freedom-fighting heritage.
I think even critics of the GNU project and the FSF would have to admit that as historically accurate. I can only presume, then, that your comment is based on a lack of awareness of the history of FOSS licencing.
It does nothing to fix the issues of unpaid FOSS labor, though, but that was a problem well before the recent rise of LLMs.