Why do spiders come indoors when they’re food sources are mostly outside?

Question

Edit: Thanks for the responses. I’ve learned a few things: 1) Spiders are not super bright and are just looking for a warm place to throw up a web. 2) There are many little critters in the walls of my house that I refuse to believe exist. 3) I suck at grammar and if you don’t see my mistake, then you also suck at grammar.

In: 48

Answer 1

I have a bunch of houseplants, so they definitely find food inside my place. I let the little ones stick around because they’ll kill any gnats that might hatch