^^ This.

There's "I'm plotting criminal activities or planning to overthrow my government" messaging which requires secure encryption.

And there's "I don't particularly want to be followed round the intarwebs by adverts for piles ointment, because I mentioned my itchy arse in a message to someone" which requires respect for your privacy.

I reckon most of us are happy enough with the latter in daily use. And, when we do need to plot an overthrow of the government, we can always flick the big "secret chat" switch. I think Telegram just about gets the balance right; sacrificing some default secrecy for ease of use, seamless sync across all your devices and 'fun' things which are likely to lead to wider adoption --whilst also allowing you to switch on the more secure stuff, as and when you need it.

Beware of the malicious PR campaign carried out by Facebook. The terms did change in a negative way, it’s enough to read them to see it. Even for EU users. Later, when Facebook realized this time things would not be ignored, they started their PR campaign. First the claimed that in EU there would be no changes, then (first time I see it in the linked article) they claimed that there were no changes anywhere in the world. At the end of the day what matters is what is in the terms, not what the spokesperson claims. And in the terms there is no opt-out from sharing data with Facebook.