I disagree. And I'm pretty sure many people have started successful businesses without learning accounting. What usually happens is that they'll learn the important parts on-the-job, which is I think the best way to learn most things if you're anxious to start a company.

That said, I kinda agree with the point that knowing this stuff, at least to some level, is 1) very valuable, and 2) something you can't totally hand off to a third party.