No one is talking about assigning copyright. The question is about a license to display the content on a website. I am fairly certain you have heard of non-verbal contracts before. For example, here is what the UK government has to say about an implied copyright license:

https://www.gov.uk/guidance/license-sell-or-market-your-copy...

> Nah anyone can do it any time.

Anyone can also sell a signature of Clooney. And yet no one does, nor would anyone buy it. This is not something that plays into a serious analysis of the NFT space, and so I am not sure why you would want to find it interesting to talk about.