Cross class skills: why does CNJ have botany and mining skills available?

[Anova]

The base classes are a relic of the 1.0 system, and allow players to access all cross-class skills from all classes. As you can guess, some are more useful than others, while others are completely useless for the class. The gatherer skills are simply useless on the combat classes but the game code was likely written in such a way that removing them causes instabilities or bugs.

The team is outright eliminating classes for future jobs in 3.0 heavensward, but I don't know if they'll rewrite the current game code and remove classes altogether. It's a lot of work to fix something that has relatively little impact on players. Most just ignore them although there is a small minority of players who want all the cross-class abilities accessible even if they will never be able to play publicly with those subpar loadouts.