You also have hackers. People can hack into your system and see what stuff you could have to scam and know your personal profile and important information.
I say yes, because other people shouldn't know our own personal stuff. Let's say that we are sharing business on a unprotected website, a stranger could join in on your conversation, see what you guys are doing, and know all of the business plans that he could spread to other businesses. So I think we should protect our internet.