The Point is, if what you say is correct it should be explicitely stated in the text. Right now it reads like Movement costs are lowered by one on any terrain regardless to a minimum of two.
"I am a Paladin!"
>OMG, Malthus, there are no damn paladins in Battle Brothers...<
"OK, OK! Then I´m a wrecked down minstrel drunkard pretending to be a paladin, singing so wrong in the midst of battle that even the undead run in fear... Better?!"