torrents have checksums on the blocks, which your client already checks, because the internet doesn't guarantee packets arrive without corruption. it doesn't matter where the corruption comes from.
I’d go dither than that and claim that almost everything of importance has checksums: Google Docs, Google Sheets, Git submissions, all my important web accounts, the traffic with my bank website and so forth.
When I look at my daily home computer usage, it’s remarkable how little I calculate on my local computer that’s actually with protecting.