1.) Your ISP ip-address is KYC'ed. The VPN one not if you use a provider that offers direct BTC/Lighting or payments with cash. 2.) With VPN, you share the ip-address with other users, so you blend into the crowd. 3.) In case of my VPN provider, I can select at the DNS level to block social networks, tracking, ads, blacklisted sites, porn etc. (I know that's not an argument for a VPN). I use the VPN/DNS combo out of convenience in order to not run my own DNS filter (pihole ...). 4.) I sometimes need to visit sites that apply geo-blocking, with the VPN I can switch location.