Another Dawn of War 2 query

Anyone else find this strange? How come Terminators, Assault Terminators, and FC in Terminator armor aren incapable of retreating? All other infantry units are able to retreat. It makes sense for vehicles to lack a retreat button, but Terminators aren't vehicles. Other powerful infantry like Tier 3 Nobs and the call-in Seer Council are capable of retreating, so why are Terminators deprived of this option? They'd probably have to retreat slower because of their heavier armor, but that's alright. It just seems like an unnecessary disadvantage.