That’s not true. At least in the case of BAYC the terms of use even give you a commercial license: iii. Commercial Use. Subject to your continued compliance with these Terms, Yuga Labs LLC grants you an unlimited, worldwide license to use, copy, and display the purchased Art for the purpose of creating derivative works based upon the Art (“Commercial Use”).

They have to pay higher rent, energy prices etc when everybody else raises their prices…

Plus you need it in copyright lawsuits to prove someone copied your work.