For 2 reasons,

• we have other similar tools - in Java. With JCR2, AFAIK one can re-define node types at runtime (TBV, but I think we did that for Forum at some point ?). Ideally we could make this an update task !
• there are so many different versions of python out there that I'm not ultra confident in how portable it is.

If it can't be moved to Magnolia Tools, I think it should be split off the main module. In any case, the bundle zip file seems to be used only for this script, so it shouldn't contain the jar files it currently has.