The answer to 'why is my spider property damage' is that spiders do not typically cause any direct property damage. Spiders are not known to eat, destroy, or otherwise damage homes, furniture, or other property. Their main impact is often the presence of their webs, which some homeowners find unsightly or inconvenient.
The most common 'spider damage' is actually the result of the homeowner's attempts to remove or kill spiders, such as squashing them or using pesticides. This can lead to staining, discoloration, or damage to surfaces. Spiders themselves do not chew, burrow, or otherwise physically alter structures or belongings.