Everyone should care about privacy and security of their communications — harmless conversations can put you in danger, even if you have nothing to hide.
One of the most shocking stories is the experience of Mohamedou Ould Salahi described in his memoir and shown in The Mauritanian movie. He was put into Guantanamo camp, without trial, and was tortured there for 15 years after a phone call to his relative in Afghanistan, under suspicion of being involved in 9/11 attacks, even though he lived in Germany for the previous 10 years.
Ordinary people get arrested for what they share online, even via their "anonymous" accounts, even in democratic countries.
It is not enough to use an end-to-end encrypted messenger, we all should use the messengers that protect the privacy of our personal networks — who we are connected with.