Bitcoin currently is like an unbreakable titanium chain linking two computers but attached each end with cotton thread.
And fiat currencies are like chains with similarly weak links at either end and a middleman who keeps adding more links?
This is like saying gold is flawed because someone can mug you.
Agreed, I am so convinced of Bitcoins potential that I want to see it develop into the best possible payment system. No excuses by saying the competition can't do that either!