The expectation for a high-scoring environment is challenged by Keldon Johnson's recent scoring struggles and the competitive nature of the matchup, which may lead to a more balanced team scoring approach rather than heavy reliance on Johnson. Given his average of only 11.8 points in the last five games and the defensive capabilities of the Pistons, the likelihood of him surpassing the 19.5 points threshold is diminished. The Net EV of -0.04 indicates the bet is overpriced, confirming that market conditions reflect the challenges Johnson faces, making this wager a less favorable option.