Not that this is the case here (indeed, I <3 Karl Seguin), but I find this mantra being used by mediocre developers to cover their ignorance more and more these days.
Yes, learning is more important than knowing, but that doesn't excuse you from knowing, especially the basics. Claim you're a senior web developer, and I expect you to know how to do CSS/JS/HTML. I expect you to have a reasonable idea of how to deploy your app to production. I expect you to know how to write raw sql to get around the leaky abstraction that is your ORM.
The sad truth is that I've interviewed more than enough 'senior developers' who couldn't do any of these things. "I don't know, but I can learn," they say. You've been doing this for five years, shouldn't you have learned these things by now?