The internet is a decentralized collection of autonomous systems (AS) and the primary benefit of this setup isn’t exactly realized afaict, which is multiple paths via different carriers. Your BGP AS is advertised via N paths, so your IP networks are thus reachable via multiple paths. Systems will take the shortest/best path adding to redundancy and throughput. Compared that to “business” service without routing options, when your “dedicated” connection drops, your IP addresses are no longer reachable from the greater internet.