That's a nonsensical comparison. Standards are important where diversity has ruinous consequences, like different paper formats, screw sizes, and unity is beneficial, like USB.
Language rarely gains anything from purity or uniformity. It is an anarchic, creative, evolving thing and imposing "standards" on it is highly dubious, especially if there are no arguments put forward for why a certain term should be used and why another shouldn't. When I first read the term splitter I thought it was totally idiotic but after some time I realized its benefits for the reasons I outlined above. Even if I still thought that it were an idiotic term I wouldn't argue for not using it but would simply use the term I prefer .. but as already pointed out, having two terms can increase clarity and readability while talking about splitters.