If RedHad don't like what Centos (of old) does, then why do they still insist on mooching off of GPL software? If they don't accept the terms of GPL, good news!

If RedHad don't like what Centos (of old) does, then why do they still insist on mooching off of GPL software? If they don't accept the terms of GPL, good news! They don't have to use it! Surely such hard working and deserving guys could write their own software and sell it honestly without needing to debase themselves by stealing from filthy hippies.