I'll admit, I never watched B5. I just know that whenever the DS9/B5 similarities are brought up, that's included and among the various similarities, that particular one has always amused me.
Honestly I think the Robert Foxworth Hague/Leyton thing is emblematic of the entire claim that DS9 ripped off B5: It's based on only seeing superficial similarities without acknowledging how context makes them totally different.