You know empirically what caring feels like for you. I think that is the fact of the matter of what it means for you to care. And I believe that mattering is something that people do, who care about anything. Because if you care about something, that something matters to you, which means that in some sense, this thing now matters, whereas if no one cared about it, it wouldn't matter at all.
I also believe that there are a lot of things that matter that you can by and a lot of things that matter that you cannot buy, but we tend to focus more on those things which we frustratingly cannot buy.
Thanks for reading and dropping a line, I'll make sure to take a look at your content as well!