There are some people who simply hook up their acoustic guitars through an amp designed for electric guitars. You might get lucky and hit on a good amp that will sound great for your acoustic, but that is a rare occurrence. That is particularly true of electric guitar amps that use transistors instead of tubes.
Yes, your acoustic might be louder, but it will likely be muddy, a bit distorted and sound nothing like what you want. There is a reason they make acoustic guitar amps, after all.