Kinda related, but in my house I don’t kill spiders, as long as they are in the corners they can live rent free while cleaning other bugs. Before, one time I went and killed all of them, in less than a week I started seeing sliverfish and similar bugs, I realized I messed up the natural order, so I just keep em now!
I leave the wolf spiders as they don't make webs.
In my old house we sprayed for spiders and ants, and a few weeks later there were cockroaches everywhere. I guess it was just a coincidence. >.>