The random on the coffee shop wifi.
Or the hacker on your apartment/university's poorly configured network.
Or your shady ISP.
Or your own government (especially likely in authoritarian countries decentralized solutions are supposed to help).
I see elsewhere you mentioned certificates on the blockchain. That could work, but someone has to actually create a standard and write the code to validate the certificate and get other people to use it, which hasn't happened yet.
Have a glass of wine and relax. There is a long line of people to catch before you get on the list.
Story time: back when I was in college a few years ago, the university network had some weird configuration where everybody in my dorm was on a single large local network. Somebody thought it would be funny if they ARP poisoned the network and redirected all HTTP traffic to shock websites. This would last 2-3 weeks until either they decided to stop or University IT finally caught them.
Regardless, I'm glad we moved the goalposts to "you don't need privacy" and conceded that my original comment pointing out how insecure this was is correct.