1. Safari is only available for macOS and iOS. There's no widely available, up to date browser based on non-Blink WebKit, and it's unlikely there will be, as it's rather tied to Apple OS APIs.
2. Aside from Firefox, all browsers that are available for all major operating systems are based on Chromium/Blink, and consequently will inherit Google's architectural decisions, and on a sociopolitical level, enhance Google's domination of the Web.
I get why someone might want Safari, what I'm asking is why the download link is on the front page of HN when there's no opinion nor perspective. I keep hearing "it's not an ad" but then...what is it?