I see your point. I guess it comes down to what kind of customer it is. I presumed maps were sold to Rust players for server use and since they're built from the creators own vision, it 'should' be kept as is. A map is a work of art, their work of art. I personally think the standard should be protected unless agreed otherwise between buyer and the seller.
I've had a fair few people proposition me about opening up maps on RE, but I've made it clear that it must be protected on their end (their password) and they aren't to edit the map to sell it on as their own. It can be edited for their own server use only. Not a single one replied..
It just seems to me that selling maps 'unlocked' opens us up for more potential issues than we already have regarding the protection of work. What's to stop a person buying your map, taking all the prefabs and throwing it in a proc gen map and selling it unprotected (with credit to you) and for half the price you have your map for? They'd be selling your monuments (disguised as a map), cheaper than you and no doubt selling more copies.
It's the same issue when selling prefabs/monuments since the buyer can now create a map, fail to protect it, put it on a server and it's now free to anyone who joins the server and is willing to open the map up in Rust Edit. The password protection on maps is all we have to protect our work.