So the whole framing of product and market, and communication media is way more interesting (IMHO) than 'selling' as an explicit skill. (And yes, I do "sell", but I'm not "good at selling", because my skillset is tied to a tiny handful of niches where I have this framing figured out)
edit: there's another bit that annoyed me about this post, and it's the idea of explicit 'selling' before having a solution to sell. It's something akin to putting the cart before the horse. Any selling opportunities I've discovered have always been in the pursuit of solving some other problem. I suppose basically if you have a genuinely good solution to any problem, selling is barely a skill worth worrying about. This is as true in interviews as in product marketing