The question title text in tour looks like a link when you hover over it, but it isn't actually one:
Is this a bug or by design?
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I guess it is by design. In the tour, it doesn't function, but clearly tells that in the real question it would be a link, because the text colour changes to a bit lighter on hover - that's default for "ordinary" links, as I know.
There is no point to make it a real link; that's just an example. In fact, even votes and favourites don't match, and in the real question, another answer is accepted.
Again, that's just an example, to let a new user understand how the things work - if you make it a link, then all the inconsistencies I mentioned would just confuse new users.
(And, just while we are there: I'd make the user names also look like links in the example question)