It would be extremely difficult with the way this forum software is designed, and the Discourse developers are probably not willing to invest the time required just to please people who hate change.
There’s hope for you though, Discourse is fundamentally different from every other forum out there, it’s actually a client-side application written with the ember.js framework, and the server-side code simply serves that application and provides APIs for the app to use to interact with the forum.
So, at least in theory, if you want pages that badly, you could write your own version of the Discourse client that has pages, and enable that via Greasemonkey or Tampermonkey. The source code’s over here → GitHub - discourse/discourse: A platform for community discussion. Free, open, simple.
If that’s beyond your capabilities, you can probably find a developer somewhere that will do it for you for the right price.
Or, you can learn to navigate here, which isn’t as daunting as it looks. There is a timeline when browsing posts from your desktop, with it’s own slider that goes smoothly to whatever point in the thread you want, without having to fight against the infinite scroll. On mobile devices and when writing a post, the counter is shown instead, and if you click the counter it gives you both the timeline and a “jump to” button. There are several ways to get a permalink to a post, including the browser address bar, which automatically changes with your position in the page, and these forums actually save your place, so you can pick up exactly where you left off in a thread.
And there are keyboard shortcuts, which are displayed when you hit the ? key, several of which have to do with jumping around within a thread, such as the # key, which calls up the “jump to” dialog to go to a particular post number.