Another client is useful, especially since the current Bitcoin client is a big mess. I was *shocked* that cryptography code looked like this.
I bet you're also shocked by what restaurant kitchens look like, and by what goes into sausages.
No, I happen to be aware of that, and that's why I usually try to eat at places with a semi-open kitchen.
The cryptography code that competent people use, doesn't look like a mess, btw. That 99% of the world uses this kind of obfuscated cryptography only shows that users don't know what they use. Have you ever looked at TrueCrypt for example? It's the exact same kind of mess.