When we get sick or feel pain, it means something is wrong with our bodies. Oftentimes, the cause of the sickness is something that we did or what we have done to our bodies... overheating, lack of sleep, stress, in other words, unhealthy lifestyle.
A pandemic like a coronavirus is perhaps a result of what humans did collectively (directly or indirectly). If you take a look at some of the precautionary measures, they are common actions to maintain cleanliness to our body and to our surroundings.
At the height of the pandemic, at the time when most countries implemented lockdowns, the air was cleaner, cooler. In many countries, crime has gone down since people either opted to or were obliged to stay indoors and there were fewer gatherings and parties, thus few or no people get drunk in public and start trouble.
You said it yourself, most victims come from developed countries that did damage to mother Earth.
No, the coronavirus is not a curse from God. It's a result of too much commercialism and people's tendency to mess up nature. If we did not learn anything from this pandemic, even if we find a cure or vaccine, nature will throw something worse in the future.