So let's actually think about this for like 3 seconds.
First of all, lots of full version songs are mapped. The main reason that people ignore them is because they're honestly lazy, and that's more of the BN's fault for having a shitty work ethic. Not all BNs are that stupid though and will literally only mod short songs, and if they are, then they honestly should be removed from the team.
I'm super neutral on this issue. I do agree that people should be allowed to map however they want, and that restricting someone to not being allowed to map something based on length is kind of silly, but I also agree that it's literally pretty stupid to shorten your song just because you have ADHD or something. (Especially when people don't do TV size cuts like wtf who cuts after the 2nd chorus)
I'm going to stay out of the argument that's probably going to come after this, but I just wanted to put that in since your view of how the BN works seems to be really skewed. BNs aren't children. Well, the good ones, anyway. They mod good maps, not just maps that have a certain length.
But please move this discussion to the link that Lust posted. This map would be a perfect example of showing why the NEW PROPOSED RULE (Disallowing cuts) should be made / should not be made.