I use to agree with your statements, eventually found out it was flawed thinking, imperfect in quite a few ways. From my pool of sites every week I can tell you this may not be the case every time. To attempt to keep it short and sweet, here's one of the explanations sent in advance to clients with starting "reasons why" I picked XY buyer intent keyword with such low estimated amount of traffic. You brought a great point into place. See the below image with relevant statements made from a guy who's definitely into SEO like me and you bud..he may only have a bit BIT BIT more of tests than us....great source I've found the same when it comes to "getting only 15-18 visitors"...it just won't be 15-18 visitors according to what kwfinder, ahrefs or any of those tools will estimate. Thinking 8-16x more visitors thanks to the associated keywords Google will match with the primary keyword at place.