If some of the low quality companies respond to you, you can always turn them down in favor of the companies you're most interested in if they respond.
I'm not sure what I'm failing to explain. It's strictly better to do a broader search. Save for the time it takes to apply. But in the case of both online dating and applying to jobs it's not that much work to apply even with a customized cover letter. You're selecting from the subset of people who respond to your initial application - or swipe. The more applications you send the bigger this subset will be.