The shift to luck part of it could be expanded on more I think, its emblematic of many believing they are hot shit at their new job or hobby. You have the right idea: the product matters and the market and shift underneath the best salespeople. But salespeople like this are also like chameleons who don't really care about the product in the first place, they go on to hock something else that's hot.
It also reminds me of every would-be day trader that posts to /r/wallstreetbets. Many will hit a hot streak after they figure out how the options market works, they start getting fancy and making bigger bets and dreaming about quitting their day job. Suddenly the luck runs out and their accounts hit zero. They thought they had the talent and wisdom to conquer the market, but they were just lucky at the casino for a little while.