What's your point? That it's not a skill? Having a system behave acceptably as it grows does not count? Getting paid for it does not count? Fine. Don't do it.

What's your point? That it's not a skill? Having a system behave acceptably as it grows does not count? Getting paid for it does not count? Fine. Don't do it. Wait till you get a certification. No one's forcing you to think about these things.