[marta_morena]

An extreme argument? If you don't care about security, perhaps you are right. In any other case, using a closed source endpoint from the company that promises you "encryption" is completely crazy. They "only" have the ability to decrypt all your messages, remove encryption altogether without notice, targeting ads based on your conversation history, and installing targeted decryption backdoors. Yeah not big deal at all, seems like something really trustworthy.

It's still better than nothing, although in the hands of Facebook it might actually be worse than nothing.