FOSS licenses explicitly grant you some rights, exactly because the author(s) wanted to do so. Most of what FOSS license do is explicitly denying the exploitat

FOSS licenses explicitly grant you some rights, exactly because the author(s) wanted to do so. Most of what FOSS license do is explicitly denying the exploitation by someone or some entity wanting to profit from it, without giving anything back. For example https://www.gnu.org/licenses/gpl-3.0.en.html https://www.gnu.org/licenses/gpl-3.0.en.html