If anything, experience from the past gave the people running these things suggestions where they can most likely cut costs without the whole thing blowing up into their faces before they retire. Same with monitoring. It's costly, nothing happened the last couple years, let's just do it less thoroughly.
Look at nuclear power. Might be the greatest and cleanest solution in theory. In practice, look at the revelations after Fukushima. Mismanagement, dramatically negligent maintenance, corruption. Would proper management have prevented the incident? Probably not, but it wouldn't have been nearly as bad. Without the tsunami, this might have continued for years to come and who knows how and when shit would've hit the fan in this alternate reality. Then the shitshow that is storing nuclear waste here in Germany. Again instead of listening to scientists and engineers in the end they dumped the metal containers inside an old salt mine. Big surprise, salt water lead to rapid corrosion and now they have to get that shit out again, but thankfully the tax payer cover that bullshit. Another example? 737 MAX. Yet again a story of a company that kept cutting costs over years and years until it blew up in their faces. It ticked pretty much all the boxes over the year. Cutting corners, saving costs, budget restrictions, ignoring concerns by engineers in charge, you name it.
It's always the same pattern. If Apple doesn't innovate, cheaps out on components, scraps QA, their products might eventually suck so much that nobody will buy them anymore and they'll just disappear, but who cares. Nuclear isn't bad. Aviation isn't bad. Landfills aren't. But these are these kinds of industries where negligence can have catastrophic results. And especially something that is as long term as a landfill is predestined for this kind of failure.