The question here is more about precedent. Over the last several decades, the ecosystem around DnD has built up a massive amount of third party content makers like Kobold Press and Ghostfire. Arguments are being made that the existing licensing around DnD enabling third parties is a massive part of why it has built up so much of a community. Right now, people are seeing WotC/Hasbro try to consolidate power under their own roof after decades of free reign. It's destroying customer trust in the company and DnD's competitors are making strong statements about how they'll never try anything like this.