Well, sure, spoil all the fun and use the field calculator!
Yeah, that looks fine...but look at it this way: now you have learned another option (probably a faster option) to use da cursor, and you don't need to open ArcMap, open the table, get to the field calculator, etc etc in order to execute a script. In a script you can also, when needed, insert messaging and such on more complex operations to monitor or even trap where things go wrong on certain records. When the field calculator fails, everything comes to a screeching halt.