This isn't true, it depends entirely on the project and the rights assigned. Meebits and Bored Apes give commercial rights up to 100k USD/yr (a formal agreement is required if exceeded), and Cryptoadz grant fully open CC0 rights to the owners to use in any purpose. - Also, when in the past few decades have you ever bought a piece of art from a creator and assumed that would give you commercial rights to their creation?