You're missing the reason this is important - the companies that run those apps (spotify, facebook, steam, discord, etc.) will be able to correlate your VPN con

You're missing the reason this is important - the companies that run those apps (spotify, facebook, steam, discord, etc.) will be able to correlate your VPN connection with your non-VPN connection, and tie those both to an app account that identifies you. It means unless you've got a dedicated download/seed box running your torrent downloads, one that doesn't have anything else on it and never connects to anything without a VPN connect, it's possible to track you down way more easily than you would think.