Interesting point - we have other non-infantry "techs" in inf bn (e.g. veh/wpn/med tech ...)
Somebody once told me the Aussies had created taxi regts (i.e. APCs without passengers)
Thus, the guys "behind the wheel/tiller bars" could concentrate on their "thing", and the biped/bipod infantry could focus on theirs ... hmmm ... (just like the veh/wpn/med techs get their trg from their corps ... hmmm ...)
And, after all - it's simply an extension of the "combined arms team" at a more basic level ... hmmm ...
Ya know, it's not the dumbest idea I've ever heard, as long as we don't go too far down the road of specialisation
(i.e. like the guys that can drive HUMVEEs, but can't change the tyres ... if ya catch my drift ...)