I don't think that's it. Emergent problems require attention and action from leadership, who in turn can make the problem visible to higher ups. This creates signal, and positive feedback when the problem is fixed or mitigated.

If the problem doesn't exist to begin with, there is no signal. Managers don't get to show their fast-acting skills, and there are no heroics to speak of.

So ultimately poorly maintained and managed projects who deliver fixes for problems of their own doing create a perverse incentive, whereas no one is lauded or promoted for doing normal day-to-day things.