What is the advantage of Always On Failover Clustering vs Always On Availability Groups?

Basic Always On Failover Clustering provides server level protection, (Eg: 2 servers with 1 shared disk space; if server fails, it can utilize another server on the shared disk space).

Always On Availability Groups provides Both disk storage DR and server-level HA Protection. It provides 2 servers with 2 shared space.

So what benefit functionally does Always On Failover Clustering have over Availability Groups? Seems Availability Groups is better, Looking at the chart comparison I see none

We utilize SQL 2016 Enterprise. Thanks,

Reviewed documentation: Failover Clustering and Always On Availability Groups, SQL AlwaysOn