proxy a sql always-on cluster

If i want to proxy a sql alwayson cluster--can I just use the SQL's cluster ip? One of these F5 documents says to put both nodes in a pool but I'm not sure I understand the reasoning behind that because normally client connect to the logical cluster ip for the always on deployment.

 

" In an Always On architecture, normally the pool includes both primary and secondary database servers configured for synchronous automatic failover."