You learned the wrong lesson.

The lesson isn't that you are helpless. The lesson is that you have power - you can think things through logically, and use tools to reach an end.

Look, failure is an option. Failure is essential - it's how we get good at things. Skill isn't something you have or you don't, it's hard earned, and the first step is breaking out a wrench to see what happens when you unthread a Presta valve core. Learning not to do that again is experience. Most learning experiences won't be so expensive, but all of them will be rewarding*. Let me tell you, once you do figure out how to swap a tube on your own, you'll feel like a superhero.

So try again. Ask someone for advice, look at it being done on you-tube, check it out in a book or on Park's website. And then do it, and don't be afraid to fail. I'm not laughing at you.

(*Especially if it's getting dark. And starting to rain. In a bad part of town. With a dead cell phone.)