Interesting take on this. Something more to ponder.
I have generally seen Rabab and Ruth as a pattern of the predominately Gentile believers. Israel was the focal group, but thru faith, gentiles are allowed in. Just as Rahab and Ruth were gentiles but are part of the lineage.
There are many illustrations we can take from these. You provided yet another interesting one. The depth and breadth of the Lord is amazing!
Take Care Brother!
Cliff