It's mainly a practicality thing. It makes the list easier if inclusion criteria are well defined and limiting it to sport routes only is one way of doing that.
Can we change the minimum cut-off to 8c+ please?
Too many people getting up Bat Route for my liking. Time for a downgrade
Feel like Im missing a bit of UKB history here, but it sounds like he's not actually a contender for the list? (to put it politely)