Literacy is one of the basic tenants of AJATT - you can't truly immerse if you can't read the language. You will miss a lot of the meaning behind words without an understanding of the kanji that compose them, and you won't be able to read a monolingual dictionary without either. There's many more benefits to learning the kanji that all make complete sense to me (in fact it just seems dumb not to) - so many that I'm not even going to bother listing them here.
However learning the kanji as a first step was a little frustrating to accept at first because I just wanted to start learning Japanese! But it has actually become a really fun process, especially when I look back at how many I've already "learned" *finger quotes*. It's going to take time for them to actually mature in my brain, but I've gone through 1000 kanji already - that's a fun thought!
As I add kanji to my deck, I highlight them on the poster to show my progress. I've gotten through the first 1000 so far!
 The poster that khatzumoto links to in his blog doesn't seem to be available any more. I had to print my own.