There is a great amount of suffering, which largely escapes articulation, that is involved in the consequences of careless, thoughtless, and incompetent labor. Broken pipes and leaks, and dysfunctional appliances cause much consternation and aggravation which is inescapable as it occurs daily in one's own home.
In large and complex living habitations, where maintenance people of numerous specializations are coming and going, evoked and whisked away by unseen administrative bodies, there is no true recourse for people with disrupted homes and lives, but to vent anger at individuals closest to their reach. The systems that place all of these suffering people in direct conflict with each other remain elusive and out of reach, and as such, hum along.
When a given problem in the infrastructure is actually fixed, and the problem truly goes away, and there is no longer a danger of being ripped off or tricked - which is all too present in unscrupulous specialists that camouflage themselves in the complexity and obscurity of their activities - the pain relief is quite palpable.