Powerpoint is a tool. Nothing more, nothing less.
(As it happens, I think its a buggy piece of junk, but that is nothing much to do with this thread.)
Learning how to select and use Visual Aids is a key skill for instructional or briefing technique. But the idea that powerpoint is 'automatically bad' is as stupid as automatically using it for everything.
You can provide someone with graphics tools, that doesn't make them an artist. You can provide them with presentation software, that doesn't make them an effective presenter either.
In a way this thread is a microcosm of a problem permeating society, namely that undue importance is attached to that which is easy to quantify.