I seriously doubt you'll get an answer from a developer, as they don't post on the forums here (or anywhere).

Resurrection is also a part of the Arcanist/Summoner/Scholar toolkit. You get that at level 12. Both serve to get the player used to the idea that healing might be a possibility at the job split at level 30, where Scholar becomes a healer.

The same argument you use for Physick could be used to remove Resurrection. Why should a DPS who doesn't utilize white magicks (aka Red Mage) heal or resurrect? Not sure if every summoner out there would object, but I could see a number of the complaining about the reduction in yet another of their skillsets.