The best result is almost never the ad. And in the rare situation where there ad is the best result, it’s an inefficiency because the poor plumber is paying for an unnecessary ad.
We’re hitting a point where we always get shitty plumbers because they have good ads and don’t need to be good plumbers. Or even worse, most plumber ads are just lead generation where I get some random plumber driving 90 minutes because they bought the lead and responded first.
I’d rather be in a world where the search surfaced the best plumber. Not some arbitrating middleman sucking value away from the plumber and the person with a backed up toilet.