Absolutely not - OPS is not a perfect stat and it doesn't properly encapsulate Arraez's value and Gallo's problems. It doesn't account for run creation, and too harshly penalizes hitters who hit plenty of singles.
Case in point - Ichiro Suzuki has a career .757 OPS, even just including his prime years it's about .800 OPS. Old friend Kennys Vargas, a similar power-only / K heavy profile to Gallo has a career .748 OPS, and even a .788 OPS in his last two years in the MLB. One dimensional power hitters are given too much value from it, while OBP machines who take tons of singles and walks like Suzuki and Arraez get penalized for that.