totally reasonable. The question then, is what are your chances of getting into a fight? And to be clear, this is a little different for you than for me. You're an Australian, which just automatically means you're more likely to get into a fight than me. As an Australian, your accent is annoying, which puts people on edge. But even beyond that, you are (or were) involved in bouncing. Me? I'm a lovable guy who doesn't really hang out in bars, drink to excess, etc. My chances of getting into a fight are exceedingly low.
So, if we're talking bang for buck, learning to fight is a "nice to have" not a "need to have." Might be different for someone else.