I agree, although I do think it's important to have a first line that draws readers in. But definitely that isn't necessary in a first draft and shouldn't stop you from writing the rest of the story. Besides, there are many ways to write a catchy first line, and often it's more the first paragraph or even the whole first scene that engages readers. The opening line that I'm most proud of (to date) is from my novel "Weasel Words," which begins thus:

It was like...
It was like...
He didn't know what it was like.
Wait, yes he did.

Eventually you find out both what "it" is and what it's like and who's doing the thinking. But at first, I'm just stringing you along so you have (I hope!) no choice but to keep reading. This wasn't in my first draft, either. It arose in my third or fourth revision when I decided my original opening wasn't all that good.