Durza wrote:T'au battlesuits automatically kill any non-T'au who try to pilot them, according to the Last Chancers series.
Well that is gruesome albeit somewhat logical (hard to fit in for a larger human, and harder for enemies to reverse engineer). Regardless, fluffwise the Tau have no cannon fodder. Firewarriors are the backbone of the Tau army and rely heavily on markerlights and forward observers to eliminate targets, battlesuits are more mobile and powerful, pathfinders are forward scouts, Kroot act as specialist infiltrators and special operations almost, humans are a bridge between Kroot and Tau, they can understand how to use a pulse rifle or a markerlight, but they are also able to take humans and potentially kroot and larger creatures in a fight.