Truth is, DDP's style alone isn't proven against wrestlers. He's chewed up so many strikers, he'll be a favorite over many other kinds of fights. Last guy he fought was Brunson, who never was great. Odds makers are just favoring Khamzat doing what Brunson did 3 rounds out of 5 and not getting finished.
Also many people aren't confident DDP's just going to stuff and outstrike Khamzat. A few have tried to say he's going to throw submissions off his back and keep the fight standing. The only argument I've heard from most people is cardio. DDP likes to march down people and throw everything at them like a tank. That's fine against strikers, but clearly a wrestler is going to love that pressure.
I feel like if you can't see a way to victory, you shouldn't bet on something. Khamzat already has won 2 decisions, winning atleast 2/3 round. Who's to say he didn't train enough to win 3/5 rounds for the biggest fight of his career?