That's not what he, or I, is saying. If you race, then it is a racebike and that falls into the racebike category.
A person who has a bike dedicated to the track -- but does not race -- is not thrashing the bike as hard as you or I do, because, they don't race and thus aren't "practicing as hard as they race" because, uh, they don't race.
See the difference? You and I would have the same usage on our racebike whether we were doing trackdays or racing, because ultimately we're practicing on our racebike to race at a later date.
A dude who puts race plastics on his CBR1000rr and makes it a "dedicated track bike" but has no intention of, and never actually races, will not have the same wear and tear as one who did.