Ask HN: What are your arguments in favor of end-to-end encryption?
> how do you respond when someone brings up concerns of E2EE platforms being used for child sexual abuse imagery or terrorism?These are only a tiny part of uses of encryption. Ask anyone if he would like to have his bank transfers, or his credit card credentials in plain text. End to end encryption allows the whole internet to act as a commerce platform.Encryption allows journalists and activists in strict, controlled regimes to let facts out. 
It allows an abuse victim to safely expose the abuser.
It allows at a broader spectrum to maintain secrecy when secrecy is the only way a subject has to distantiate himself from harm.Disabling end to end encryption requires an implicit good faith on those who look at our communications, and the history is full of abuse from those figures.