Being wrong is fantastic. You simply have to come to appreciate it. Every time you learn that you are wrong - and this applies for everything in life, not just with programming - you never have to be wrong in that way ever again. Not for the rest of your life, if you can remember, will you be wrong in that particular way. How amazing is that?

You're not 'focusing on the negatives', you're getting to be wrong, a fantastic opportunity. Most people don't get to be wrong. They persist in their wrongness and swim about in a sea of mediocrity with no sense of personal advancement. To get to be wrong on a regular basis is nothing short of exciting. Sure, others will misunderstand it. Managers and business types will not understand why you simply couldn't do everything flawlessly from the start and they'll try to give you a hard time about it. But it doesn't really matter. No matter how hard they push you, they can't make you think. No one can. It has to be undertaken entirely under your own will. And when you do so and come up with something wrong - you know you are actually guiding yourself to develop rather than stagnate.

Go on, be wrong! And then never be wrong in that way ever again!