I hear you, but there are ways in which that fuzzy matching can be useful. I think the original use case was allowing for titles to be matched in spite of markdown heading syntax, so “# My Title” could be matched by [[My Title]]. I’ve taken advantage of this in the case of placing a timestamp in a title to protect against that title being updated at some point in the future— I know that even if I neglect to update all instances of the references that link to such a title, I’ll be able to link to the draft on the basis of its timestamp regardless of what its title changes to.
There are other ways to handle cascading updates of titles and links, of course. Here’s part of a conversation about it. Admittedly, my own workflow in this case isn’t precise, and depends on my own idiosyncratic way of working with wiki-links— an action that produces a wiki-link based on a timestamp with the rest of the title being outside the double brackets.
Long story short: I’m reasonably sure that the current fuzzy matching of wiki-links is a good thing. But I understand how it might be counter-intuitive and perhaps even undesirable in some cases. Perhaps the wiki-link syntax definition could acquire one more option: [[x:for an exact match]]?