In terms of betting odds, it makes sense. The odds are not who would get the MVP if the season ended today. The odds factor in who is most likely to win the division and/or #1 seed, and which QB is most likely to keep those numbers thru the final half of the season.
Based on track record, Allen is the answer. And that's why the odds are that way.
If this was Week 15, and the numbers were the same, Maye would be leading the odds.