I'm not a fan of Facebook. I didn't care a ton for the platform even before all the awful things that have come out over the last couple of years. I keep my account because of family and Facebook marketplace. That's about it.
As developers, we can make a choice about putting any Facebook code in our apps. Do you trust their SDK to not be doing secret things? They've proven they don't care about anybody's privacy. If you rely on one of their SDKs, it's a difficult choice. No judgment here but deleting their SDKs is something you should consider.
Developers, it’s Time to Delete the Facebook SDK by Andrew Orr