To be fair, the macOS Safari is not tied to the OS. Don't remember if it ever was, but it def isn't anymore then.
Unfortunately it was and still is. https://en.wikipedia.org/wiki/Safari_(web_browser)#Version_c....
MacOs is slightly more forgiving in that the last 2 versions can get the latest safari. However, people tend to keep a computer a lot longer than a phone and many don't or can't update macOS, so it's not much better.
alt Hacker News
Unfortunately it was and still is. https://en.wikipedia.org/wiki/Safari_(web_browser)#Version_c....
MacOs is slightly more forgiving in that the last 2 versions can get the latest safari. However, people tend to keep a computer a lot longer than a phone and many don't or can't update macOS, so it's not much better.