organic chemistry - What is the rationale of the IUPAC name for DDT?

The structure of DDT is

One of the benzene molecules should be the parent chain as it has a greater number of carbon atoms than the straight chain (which has just two carbon atoms). Taking benzene as the parent chain, I think that the name of the compound should be 1-Chloro-4-((1'-(4"-chlorophenyl))-2',2',2'-tricholoroethyl) benzene.

But the Wikipedia article states that the IUPAC name of the compound is 1,1,1-Trichloro-2,2-bis(4-chlorophenyl)ethane.

Why is the ethyl chain taken as the parent chain when it has lesser number of carbon atoms than the benzene ring?