Yes. General search will give you general results. For day-to-day issues, like finding a nice restaurant in my neighborhood or some information of a device I own, it'll give everyone good results and that's fine. But once search become personal, i.e. about topics and issues you care about and (potentially) know a lot about, general search results aren't acceptable anymore as you know they're incomplete, not ranked accordingly to any meaningful measure given your understanding of the domain, and over-all the "generalness" of the results.