Here's Why You Should Never Kill A Spider [View all]
https://www.familyhandyman.com/article/heres-why-you-should-never-kill-a-spider/
Even though spiders are creepy crawlers that you probably despise, killing them could actually do your house more harm than good. Here's why.
Besides having long legs and a creepy demeanor, most people are scared of spiders for one specific reason: Their bite. If youre not sure the type of spider, theres always a chance that the spider could be venomous. However, it has been proven that only about 10 percent of spider bites lead to necrotic skin lesions. These types of bites actually dont come from the innocent brown spiders that make a home within your home. In fact, its actually quite difficult for a spider like that to bite you.
So if thats the case, why in the world are we so drawn to killing spiders? If anything, spiders can actually help our homes instead of harming them.
Spiders Rid Your Home of Pests
More at link. I've always thought it best to let them eat all the flies and other bugs and then they will starve to death after their work is done..