Umm, the site in question is a big button to download something to run on your computer. You don’t think it would be bad if someone hijacked that and had people downloading malicious software?

You seem to misunderstand https... for one, it doesn’t hide your visit to that site from your ISP; they know the IP address you visited, and due to SNI, they will even know the domain. The point is to make sure you are connecting to the site you think you are connecting to.