I feel copyright licences stifle what is freely shared; maybe they should make the CC-BY licence the default to users. People already repost images and attribut

I feel copyright licences stifle what is freely shared; maybe they should make the CC-BY licence the default to users. People already repost images and attribute them all over the internet, but a licence like CC BY-NC-ND ends any chance of humanity benefiting, or posting it to Wikimedia.