Well the most important part of this discussion is - can YOU do noseblunts, and do you do them from the side only? If not, then you probably shouldn't criticize people who can do them.
What matters is if the nose is locked over the edge of the ledge. Booger slides suck. I've done nosebluntslides using both methods of entry and yeah, it feels cooler popping from the side, but on a short obstacle that results in a nosblunt bonk whereas going over the end gets you the whole slide.