Yes, they may be able to equip it at that level, but that does not mean they will become comparable when it comes to offense/damage, when comparing to the same professions you choose to compare them with.
Not that it's really needed, but a justifiable argument could be that it's what it takes for a 170 doc to make semi-decent damage and the fact that for a Doc to get the skills needed to keep it out of OE, they have to use items, perks and armor that are comparable to an enforcer having to wear items, armor and perks that otherwise do not help their primary skills/roll in order to keep their weapon out of OE.