...what if later on they make Torahiko's route only accessible once we have achieved everyone else's good ending? Plenty of VNs I know seem to employ this method for their "true canon character" route
It's worth noting that in the OG, at least, Torahiko has always been seen as the mascot and the canon boyfriend for Hiroyuki, so Homecoming's devs also completing Tora's route for the last seems fitting