That may be too logical for Sox execs in their poison ivy towers.
But you're right -- if he's good enough to make the majors in a pennant race in September, then Arias is good enough to hone his craft with big league teammates next year whenever they're not playing actual games (winter conditioning camps, Spring Training drills, MLB off-days, lockouts, pandemics, etc).
How is it bad for a young batter to continually face deliveries from pitchers like Chapman, Tolle and Bello?