Not to mention the good effect it would have on new comers, who often treat this site too lightly. As new users, we don't know even where to start looking...
Usually, the help center is the best bet: It has pages for what is/isn't on-topic, and on how to write a good question. A site's meta is also a great place, as it often holds discussions on what is wrong with certain types of questions, and guides on how to write the best possible questions in the best possible ways.
While a high scoring question or answer should technically mean it's a good question/answer, just looking at one doesn't teach you what makes it a good question or answer. Was it the topic? The way it's written, making it extraordinarily entertaining, or so that everyone that Googles for this information can find it? The attention it got on HNQ?
There are far better places out there to learn about how to start your participation than just looking at highly upvoted questions or answers. If you do want to look at them though, they're not that hard to find. The most upvoted questions can be found under
/questions?tab=Votes on every site. And you can do a search for nothing but
is:a and sort the results by votes on any site too, and you'll get a very good overview of the most upvoted answers.
So, I don't really see bumping old questions/answers with a lot of votes as a good way to educate new users on a site. All it is likely to do is provide some entertainment value, or pollute the active tab with posts that don't need any more attention.