First there is an unspoken assumption in your post. Embezzlement can only happen when someone is handling someone else's money. In many sole proprietors, this is not the case. So for those, sure. But it's important to understand the limitations here.

But still within the core area, I think you have to accept that I would trust your books if they were kept in pencil more than I would trust books kept with software that didn't have proper controls.