Sure -- you can restrict the search to websites that seem to be relevant to the query. Maybe you do it by hand at first, then you switch over to an ML model. You optimize the ML model for a few years, adding in more signals, and allowing it to guide other parts of the query to keep costs in check and raise quality (as measured by your preferred metrics)... and now you have reinvented fuzzy search that behaves in unintuitive ways, and people on HN complain that your service was better when it did raw string matching.