I can’t see the big deal. We use the Facebook SDK specifically for the free analytics. It’s just a default part of the SDK. It’s not sending anything any other analytics package wouldn’t
Could you maybe expand on what company you work for so that the rest of us can avoid it and its products?
Uploading all of this data to Facebook just so you don't have to run a Matomo instance (or whatever controlled analytics platform you use) is either laziness or disregard for your users. There's a reason the analytics are free and sacrificing your users for something this small is exactly what is wrong with the modern software ecosystem.
But the where matters as much at the what; sending it to FB means that they add it to their profile of your users.