End to end encryption is worth nothing when WhatsApp have access to the encryption key. And the fact that all photos you see on WhatsApp are saved on your phone without encryption means that it's only encrypted when it's sent, nowhere else.
I also have very suspicious examples of advertising linked to WhatsApp conversations.
From my perspective, I'd rather have an enemy of country to have my personal data. It's far harder to use for them than for my country.