I think it's fair to care about it for precisely the reason that you don't get it. This problem doesn't get as much attention, and is more likely to get worse because of sentiment like this :(

Yes, it doesn't seem to be urgent or important a concern. But, that's based on our limited observations. Hopefully, that turns out to be true, but I wouldn't be surprised if there are more unknown and domino effects that causes light pollution to be just as or nearly as deadly in the long term.

Why?

What should we care about then? Is pollution worse than COVID19? Human trafficking?

There are so many problems in this world, we need different people working on different problems.