What you are saying make sense. But more specifically, what good would come from this? Perhaps only pushing the URLs makes relays more likely to pick up my notes as opposed to media which would be more expensive to host for them? 

 See this:

https://nostr.at/nevent1qvzqqqqqqypzphn7e50zja4x4ke0lf05mwq60kqjezakdx92qrw0rem2md27l4j9qy2hwumn8ghj7erfw36x7tnsw43z7un9d3shjqpqpkrm2se7ar97s40le78akzgnxg5qkcnw47tv5l6svvmk0md05rsqqmtval