Peace Pagluu
Yes … indeed the Jewish nation thought themselves superior because of their bloodline to Abraham (AS) … but here is the response …
John 8:39 - PassageLookup - King James Version - BibleGateway.com;
John 8:39 (King James Version)
They answered and said unto him, Abraham is our father. Jesus saith unto them, If ye were Abraham’s children, ye would do the works of Abraham.
Inheritance or those who inherit should be the correct understanding of ahl-al-bayt and it is open enough to be considered for wives also. However, Aal does not require one to be ‘good’ and should be translated as progeny.
Aal = progeny
Ahl-Al-Bayt = Inheritors of Muhammad (SAW)