I'm not sure why your level of experience, or age of the bike would come into play in not warranting the ticket. 'Crossing that line' is usually the LAST thing you want to do, whether inadvertantly or by purpose, and whether the opposing lane is clear, or not. It's simply poor practice.
Unless it is done deliberately for purposes of passing, most 'wise', experienced riders consider the oncoming lane a 'death zone'.. ie not to be entered under any circumstance. Intentionally swerving, or not - it demonstrated a lack of due care and control to the observing officer in keeping to your own lane of travel. The appropriate action in your circumstance would be to get off the road, stop in a safe spot, get off the bike, and physically examine your bike from there - not trying to peer 180 degrees at the front of your own bike while in motion.
I'm not trying to pile on you here.. but i don't see where the charge ISN'T warranted.