With 40° flap in C-172 or 150, you can point the nose where you want to land with not much risk of exceeding VFE. Since drag increases with the square of airspeed, you can get a steep approach. Best to practice ahead of dire necessity.
Once you have a field made, likely using best glide to reach that point, a steeper approach can give you a longer ground run once you have made very sure you will clear the wires. Flying gliders, I've dropped in to several fields. Assume there's always wires (look for the poles) and plan your approach accordingly.