Is there one?One way to hypothesize about "why bad stuff...

Is there one?

One way to hypothesize about "why bad stuff happens" is to look at the changes that the bad stuff necessitates, then accelerate the changes purposefully so that the bad stuff need not continue.

"Everything happens for a reason" is a philosophy that may or may not be true. Assume it is. What's the real reason for covid? And can we fix that instead of trying to formulate a vaccine? Because if there's a deeper meaning, we should know what it is. If we don't learn the lesson (assuming there is one), then in x years time we will find ourselves facing another pandemic much worse than this one.

Example: if covid necessitates stricter regulation on nursing home care, then implement that change. Well, governments are already starting to do that. That's an obvious example, and fairly practical.

What other changes have been required, that if we accelerated them, would make covid unecessary (in a philosophical sense)? In other words, why did it happen?