Sam literally loses more DPS to positionals than Monk, assuming the Monk just sits in rear 24/7. Its like a 5% DPS loss if you literally never leave rear on monk. Monk currently has the second least impactful positional abilities of any melee job right now from what I understand. It was positional oriented when missing a positional dropped your combo, but right now outside of bootshine it basically doesn't matter, while SAM loses out on essentially its burst window for not hitting positionals outside of its window, and NIN missing their window will usually be a larger DPS loss than monk missing a bootshine or two in theirs.
This is part of why a Monk rework was sorta inevitable, and why the job was so confusing to new people: A huge part of its supposed identity was basically untrue and only existed to add to a job that was essentially all white noise. The actual interesting part of Monk that demanded anything of you was balancing your buffs and debuff rotations, which still appears to be in the job.