Should large corporations be able to break the law because it's too hard for them to manage their data? Should they be immune from law suits because actively moderating their product would hurt their business model? Does Facebook have a right to exist?

You know exactly what it would look like. It would look like Facebook being legally responsible for using the data they get. If they are too big to do that or are getting too much data to do that, the answer isn't to let them off the hook. Also, lets not pretend Facebook doesn't have a 15 year history of actively misusing data. This is not a one off event.

>Should large corporations be able to break the law because [...]

No, because this is begging the question. The point being disputed is whether facebook offering a SDK and analytics service counts as "intentionally eavesdropping". Anyone with a bit of understanding of how SDKs work should think it's not. If you told your menstrual secrets to a friend, and that friend then told me, that's not "eavesdropping" to any sane person, but that's essentially what the jury ruled here.

I might be sympathetic if facebook was being convicted of "trafficking private information" or whatever, but if that's not a real crime, we shouldn't be using "intentionally eavesdropping" as a cudgel against it just because we hate it. That goes against the whole concept of rule of law.