The arguments here that it is good advice is some mumbo jumbo handwaving that you will learn "something" because it is hard. Guess what else is hard? Trying to sell lemonade for $1000 a cup in the ghetto.
Will you learn "something"? Probably.
Will it be a good use of your time? Probably not.
And for your information, my posts here have plenty of upvotes, so do not take the sheer number of 37 Signal fanboys retorting as a sign of evidence. PS, 31 Pixels? Seriously?
I suggest rereading the article again. If you still don't understand what the point is, try rereading again.