There's a very large difference, whether it's recognised here or not, between having watered-down ideals and having a strong, mixed set of ideals.
Just because someone is socially Liberal and fiscally Conservative doesn't make them Lord Neutral of the Neutral Planet.
Well by centrist I don't mean neutral, that implies lack of resolve or opinion. I usually just think of beliefs that don't land them firmly on one side of the political spectrum or the other, which overall could land them close to the middle (of course leaning one way or the other).
To find a true centrist would be hard to do, you can really only get close.