Centrist positions are inherently unstable (think top of the hill) because they require active efforts to maintain the balance between factions prone to polarizations (left->far-left, right->far-right). It requires consistently good statesmanship or strong external challenge for opposing factions to act in united manner.
While setting proactive centrist initiatives might be hard, centrist sentiment with passive inaction is very very easy. All you need to do is tut-tut occasional "excesses."
In other words, the centrism of taking risks is very different from the centrism of avoiding them.
It depends on how the populace feels. It could also technically be a valley with the extremes on either side. Honestly though I think the centrists can never find positions people can get rabid about because by definition it calls for moderation.
