Quite the opposite.Not to be a smart ass, but what is everyone's obsession with mounting axes on their FJs? It has to be for looks.
I do not like carrying a full size ax in my rig, so I prefer to carry it outside.
An ax serves many a purpose when off roading.
1. Firewood if camping
2. A handy weapon if needed
3. Also useful as a hammer, sledge, mallet
4. The handle can be used for a leg splint in an emergency
5. Digging a fire line.
Also if wheeling on Forest Service land, they often require you to have tools handy if a fire breaks out, and they may call upon you to help them in an emergency situation.
It is a good idea to be well equipped when in the back country.