The title of the blog post or perhaps the news as seen on some other site is something you shouldn’t fear and according to the beta testers of the new version of Whatsapp, there’s an option to disable the user info sharing if you probably want privacy. And speaking of security focus, the end-to-end chats and calls are encrypted.
Unfortunately, it might seem that Whatsapp had picked the wrong security technology that originated from Telegram to secure its service as Telegram was recently notorious for weak security, false advertising and being used by te****ists. Why would any normal person use Telegram when they could use Whatsapp like what many people use? That is not security improvement at all like we expect better alternate security for the service we already know of.