This list isn't really selling it to me! Mmm, aluminium, yummy propylene glycol.
The things you need from that list are Wheat flour (white), corn flour (starch), Sugar, Cocoa, Baking powder, Salt, Vanilla. I doubt carob adds anything that a spoonful of instant coffee wouldn't.
Now I get your point that it wouldn't produce the same result, but I'd be surprised if it produced a worse result.
It reminds me of when I first started eating homemade bread. At first I didn't like it because it was different than I was used to, I considered getting the additives myself to get the same texture, but eventually I learned to love it and now can't imagine eating supermarket bread.
The things you need from that list are Wheat flour (white), corn flour (starch), Sugar, Cocoa, Baking powder, Salt, Vanilla. I doubt carob adds anything that a spoonful of instant coffee wouldn't.
Now I get your point that it wouldn't produce the same result, but I'd be surprised if it produced a worse result.