OP probably has symmetrical fiber so there’s little functional difference. Unless you mean the ISP would just assume that all that upload usage is due to torrenting. In that case, you’d be surprised at how much upload somebody can utilize when they actually have access to it. iCloud/google photos backups of a bunch of pictures/videos you take while you’re out suddenly occurring when you connect to your home WiFi, streaming yourself playing video games online, all kinds of stuff can cause all that usage. They can still suspect but what are they supposed to do about it?