The problem with splitting comes from boring matches, when the players are spliting they tend to not try and this makes for boring matches that the audience hates, no one wants to see that and the TOs and Sponsors get pissed. If they just played to win, no one would even question if or why are they pot splittng. No one would know.
In Magic, if player's decide to split the pot, they don't even play the match, they just let the judges know. I don't see why other competitive scenes can't just adopt this model.