Let me try putting it to you this was, as an arachnophobe:
If there is a spider in your house, objectively, that is a fine, even a good thing. The only reason you would want it to be gone is if, like me, you have an irrational fear of them. It's something to apologize for, and to (unlike me) try and get past.
Even if the spiders outnumber you, like there's two or three of them visible in the same room as you (aaaaa), there's no issue with that. The spiders aren't trying to replace you, and it is not a slippery slope.
The issue only begins when a hundred spiders come into your place and form government, and tell you that you need to either leave, or be a second class citizen in your own house, because these spiders' ancestors one thousand years ago lived where your house is now. Now you have all the rights in the world to squish every single one of those little bastards. Or just set your house on fire and live out the rest of your days in a psych ward.
