I didn't say that I trust Meta. My point was that saying they're doing it so they can read your messages just means that the people commenting don't know how E2EE works, or how it is still not a 100% secure way of communicating, just a more secure way of communicating. Once one of those ends is compromised, it's game over.

I really don't understand what the point of the quote you're citing? Or how it goes against what I was saying?

The best thing you can do would be to use E2EE. That would be the most secure thing. It won't, however, prevent the makers of your E2EE product from reading the messages once they're unencrypted, regardless of who makes it.