Why are you guys criticising one piece of sample code, and going way off topic? It's like a finger pointing the way to the moon. Don't look at the finger, or you'll miss all the heavenly glory! (Bruce Lee)
It's a sample, simplified for presentation purposes. If you really want to pick on the code, pick on Meteor's code base - not presentation samples - and fix it while you are at it, the way you say it should be.