It never ceases to amaze me just how absurd capitalism can be. It's the best system we know of so far but it falls massively short of good enough in its current form.
What you've said follows perfect capitalist logic. And yet, what you've said incentivises those plant operators to ensure there's more outages. Nothing they can do - whether that be to make their operation leaner or make their generation more efficient or whatever else, nothing can compare to a 350x increase in pay per megawatt hour produced for $0 investment.