I said:Magic is definitely something to be careful using
I agree with this. Using magic too lavishly is dangerous, for several reasons.
One is generality: magic is no specific term. What qualifies as magic? It differs from author to author, so care should be used to not always employ the same word. After all, how can the ability of some to heal the wounds of Earth and the power to destroy the very mountains be classified under the same category? And indeed, not all magic is indeed magic. Cannot some seemingly supernatural occurences be merely the result of science? Obviously most mainstream fantasy is in a "Middles Ages of Europe" setting, but some advances can be made, such as the invention of Greek fire (which of course in the story would go by some other name).