Yeah but you're still using the numerical argument when, really, it's more about how he was played in that particular series. Fact is, against very good players of spin, he came up short on a couple on pretty helpful decks he usually dominated on. Warne's bowling in India dents his rep, this should count against Murali irrespective of how successful he was elsewhere and in other series. It doesn't make him any less an all-time great, just not invincible.
It's not that much of a knock, really, just shows that as good a bowler he was, with the right method, bats could still succeed against him. That's Test cricket.