Ask HN: How can we stop UX people from changing UIs to get promotions?

Every product seems to go through constant UI churn that has no benefit to users other than changing around whitespace or refreshing the look.

If you have a full time UX person they _must_ change the UI of your product otherwise there is no way to get promoted.

That is just an unavoidable fact of incentive structures.

As a company how can you avoid that issue?