I see philosophy as a young discipline (still young, like Elizabeth Taylor). What we need are more theories, not a verdict on which of the four that we have is superior/least inferior. This is not a call to abandon our scruples and jot down anything bordering on consistent. Theory proliferation needs to be bridled by our reflective judgments and our common sense. But in too many fields we have yet to cut the issue at the joints. In the dialectic we are far nearer to the brainstorming part than the conclusion-in-unanimity part.
At the end of the day, we presumably want knowledge and understanding of important issues. But philosophical exploration may be what we really need for now. If the existing options are inadequate, we shouldn't necessarily want everyone to converge on the "least inferior" one. This would seem to justify some degree of dogged perseverance even in the face of stronger arguments, at least if you think that further refinements to your position could prove fruitful. The risk, of course, is that becoming personally invested in a position could undermine your ability to recognize when it has turned into a dead-end.