Not a bad point, actually 🙂.
But they are not similar: Rozza was back from the dead, and was considered finished- that while nobody actually knew if there's any juice left there. There was, just enough to be a good squad option.
Other thing ( still related) is that Rozza, though older, doesn't seem to decline the same way: he may not be able to play 2 games in three days, but he hasn't lost his burst of speed, and has other attributes which serve him well
(Pass, reading, natural urgency). Art was on the border of being too slow for the role as it was, and now he's way too slow. Years and injuries aren't doing him any favors.
Also the role is different, and Art's is our worst position - he's realistically back up level as it is. What after?