Why? What benefit would https provide over http when visiting a pure information (and I'm guessing statically generated) website?
It is a valid thing to point out, when implementing https on gkh's site would take all of 15 minutes to set up (let's encrypt or cloudflare or whatever you wish).
Things should be https by default these days. There's zero downside anymore.
If you are on a public network without using a VPN you open yourself up to MITM to inject something malicious