The biggest reason why we cannot make the same comparison in this case is accessibility. In Anabaseios BLM was a head above the next highest, but it was much harder to access that damage, sure we had probably the most BLMs playing most other points of the game, but it was still the least played caster. Most of the player base do not care about the damage as much as we think they do. Which is why SMN was the most played caster and had almost as much players as RDM and BLM combined.
This leads me to the point that even if we reduce the damage of PCT a little, I doubt we will see any substantial decline in the amount played. If we take this information into account, then we ask why does SMN suffer from damage due to ease of use, but PCT does not? Because RDM with infinite instant rez and magic barrier presents more damage than the class that can do 1 instant rez in a minute.
And here's the point I'm making: the standard for tuning is inconsistent no matter how we present a class's strength and that is why I would like to push for a response from the Devs in regard to not only PCT damage, but how they profile the casters in general.