Whiteboard coding interviews are underrated. Sure, they suck to learn and master, but once you gain the experience it's a passport to a wide range of top-shelf jobs.
Can people game them? Are they flawed? Absolutely. But that's true of literally any interview practice.
The idea behind whiteboard interviews is if they're challenging enough, the only people who can fully exploit them are either very bright, very motivated, or some combination of both. That's a better signal than asking someone to lie about their "passion," which any slob can do.