> As a user I would prefer to be the judge of what is relevant. If the results aren't what I'm looking for, then I'll modify the query until they are.
Funny you should mention that workflow, because Google highly values reducing the number of times users have to do that kind of iteration. If they can work out what you actually mean and give you that first time, they count it as a win and stick with that approach.
> Having the search engine make these opaque decisions on what it thinks I meant to search makes it feel like playing a game of Peggle, where I have no idea if what I'm going for will be what I get.
I think on average this kind of "semantic search" works out for the better, for most people, most of the time.
I tend to like precise results too, but I often appreciate Google applying its "magic," so I'm not sure Google running in a "all magic suppressed" mode by default would be better. E.g. I recently searched for help with an issue I'm having with my refrigerator. I searched for "Samsung BLAHBLAHBLAH drawer freezing" where BLAHBLAHBLAH was my fridge's model number. The search results included stuff for other similar Samsung refrigerators, which are all very similar, so the results were quite relevant to my problem.