To paraphrase Stallman on the topic of permissive Free Software licences: Some people prefer permissive Free Software licences, and feel that copyleft licences

To paraphrase Stallman on the topic of permissive Free Software licences: Some people prefer permissive Free Software licences, and feel that copyleft licences like the GPL introduce unwelcome restrictions. I don't understand this objection. They're unhappy that the licence doesn't grant the power to deny other people their freedom?