I'm sorry kimir, but I don't agree. A wheel fell off. It fell off. That means it was not very well attached before the plane left the terminal. Forget that it is the airline industry, in any industry this would be unacceptable. It would be unacceptable if it fell off a bus. I don't want to hear that pilots are trained to land without front wheels. (And in any case, I'm not sure they trained to take off without the front wheels.)
While I agree that the media scaremongers, and work to instill fear (about everything) it's difficult not to percieve a wheel falling off during taxi as a serious issue.