I'm not penalising him for anything. Actually it's your approach that effectively penalises bowling ARs who have shorter careers and therefore even if they have excelled at batting moreso than Kallis at bowling, they lose by default in comparisons because it is far easier for Kallis to pare down his bowling and then claim more credit for on average increasingly lesser returns.
It's a simple question. In his overall career, how good a bowler should Kallis be judged? If you want to say that it's fairer to judge him by maybe 2/3rds of his career but not beyond then that maybe can be an argument.
But it's not fair to just give his bowling automatic longevity points to pare with specialists ARs when we don't do that to make Anderson's wickets into him being elite class or Warne's runs into him being an AR.
Because your claim was that Kallis gave SA an extra bat. Yet before Kallis and during his time it was effectively the same makeup, except Kallis was a much better 5th bowler option.
Do you believe that Kallis the player helped his team by playing longer?
Do you believe Kallis when he said he would not be able to play as long if he didn't dial back the bowling.
If the answer both of these is yes, then you are penalising him for a smart call.
Fair point on the bowling/batting AR. He's so far ahead on workload that it's not an important one though.
On quality, not role: Kallis, even at peak, was never much better than a mediocre quality bowler by specialist standards. I tend to rate him in line with mediocre bowlers. Between Nel and Ntini of the guys he played a lot with, but closer to Nel. I'm not really a fan of neatly axing sections of records, but I'm making some allowance for Kallis having a better peak than Nel's career. And some allowance for him being worse thereafter. Which comes in a watered down form, because, like other medoicre quicks, he wouldn't have been selected for his bowling alone after his peak. By the standards of batsmen, his bowling is magnificent.
Everyone credits Anderson for his longevity. We don't see him being grouped with someone like Hazelwood. Anderson doesn't usually get grouped with elites cos he falls short on measures of quality other than those related to longevity. If you want to argue that Kallis didn't have the quality, this would be analogous to the Anderson example. Workload criticisms are not.
I credit Warne for his batting, so far as a 17 average allows. If Kallis averaged a comparable 45? with the ball, we wouldn't be having this discussion.
I excluded 90s for the extra bat factor. Why would I possibly be referring to adding a bat from before Kallis even played? This is a 2000s thing. In the 2000s, with 2000s resources, RSA often played one specialist bat more than they would have if Kallis did not bowl. And this is where a huge portion of his value as a bowler came from. However you assess his quality and workload, 6 bats are a whole lot better than 5.