It may be pointless, but it's still technically better.
This, basically. And once you learn the better method you aren't going to forget it (Unless you have altzeimers(sp)), and ultimately you will be a better programmer for sitting down a taking the time to practice good habits.
Spending time to improve things becomes meaningless if it doesn't:
a. finish your game faster so that you can have it released sooner therefore creating more potential to gain more players at a quicker rate, or sooner than later
b. make your game more complete so that it can be released therefore creating any potential at all to gain players in the first place
c. make your game work so that it is even playable by potential players
Optimization importance completely changes when the game has more than a handful of players...
In the case of WoW for example, their business plan was setup to work around hundreds of thousands of players, so in their case:
Spending time improving anything is meaningless unless it:
a. decreases the processing time spent in any given procedure depending on the number of calls made for that procedure
b. decreases the total amount of bandwidth in use
c. allows the game to operate longer, more stable, or more efficiently in any way possible