[RPM] High Craft vs. Alchemy (by other skill)?

[vicky_molokh]

Greetings, all!

I've examined the High Craft article/section from Pyramid #3/66 The Laws of Magic, and I'm not getting it. High Craft seems to overall require more fuss, be more limited, and have less clear mechanics than RPM Alchemy. Is there any reason to use High Craft instead of just using a different skill in place of Alchemy (and adding the obligatory -1 to -3 for Hard to Easy skills)? What am I missing?

Thanks in advance!