Theoretically you can run a web server at home but you'll have a problem if you start to get a lot of traffic or you have trouble with your internet connection. Your website will be trivially easy to DDoS.
Services you create on Freenet will scale automatically and are immune to DDoS.
it doesn't really scale in the traditional sense, it just pushes the 'damage' out to the entire net.
freenet overall is one of the most bandwidth and storage intensive platforms out there. I understand why -- but I say this as a means to say that it doesn't really deserve direct comparison to the open web. it's not the same thing, even if the work overlaps -- it's a lot more work.
"Damage" is misleading. A DDoS only harms when concentrated on a few peers. Freenet distributes load across the network, autoscaling in response to demand and preventing overload.
As for bandwidth and storage, I think you’re referring to the old Freenet (now Hyphanet). The new Freenet is optimized for lighter services like group chat and isn’t designed for heavy data sharing like BitTorrent. It should be much less of a bandwidth hog.
Services you create on Freenet will scale automatically and are immune to DDoS.