The thing is what is “uncooperative”? Does that include valuing your fourth amendment rights to not consent to a search? This assumption that if you don’t want to be searched, you have something to hide is what drives me crazy. What if you were a POC or a foreigner (getting somewhat back to the horse training relevance) and you were frequently singled out as being suspicious? How many times would you consent to being searched just to be nice when it is your right to refuse consent?
As you said, if something about me or my vehicle or whatever seems to match up with something/someone involved in a crime, LE doesn’t need my consent. If they just want to search without cause, sorry.