Not at all, the exact same thing happened to me. I saw it at first in her gallery before I saw sherlock. Then like the day after I was browsing and BAM, I saw the light that was Benedict's distinct nose and lips.
How? Just- how? I cannot wrap my mind around creating basic structure and elaborating off of that. I can't see it. Do I just need formal instruction? College classes are coming soon, I'm guessing that's what I need. I could stare at this for hours. So simple but it's a capture of recognizable characteristics and I love it so.
I did take a few formal classes and they did help immensely. I don't know where I'd be without those months of life drawing, perspective and anatomy lessons.