I've never used a concrete trowel to make waffle batter, doesn't mean I'm going to try it.
On a more serious note, if you had never used a concrete trowel before and you weren't totally sure what it was, using it to make waffle batter would give you a better understanding of what it was and what it is good for.
Practicing shaving your bikini line with hedgeclippers you stand to lose... well a lot more.
I said cutting hedges. Vaguely related tasks (cutting something shorter) but vastly different tools, materials, scale, etc