There have been several questions I've asked that have gone unanswered. A couple come to mind. One was a question about why, in the official Baha'i' information, the fact that Baha'u'llah appointed his son as his spiritual successor, and then in turn, the grandson. From an outsider's POV, this is pretty relevant info, but it seems it's a forbidden topic. (I think there are several forbidden topics) Another is the 'equality of women' issue that somehow doesn't apply to the House of Justice. Adrian did try to explain it to me, but most certainly it was no outright admission of hypocrisy in the leadership. I know If I was there, I'd just put forth a woman's name at the next round of elections. Course I'd probably be labelled a detractor and booted.
So every time I encounter something like this, I think there are two faces ... the public side, and then the secret within the Baha'i' stuff.
The question about why they appointed successors is that the question or why they appointed their own bloodline?
This is not a forbidden question. There are no forbidden or secret questions we can't answer or speak about so I don't know how you arrived at that conclusion.
In His Will, Baha'u'llah appointed His eldest son as His Successor and Interpreter. He said Abdul-Baha knew everything He meant and was thus the one who was best able to succeed Him.
Then Abdul-Baha appointed Shoghi Efrendi in His Will to be the next Interpreter and Successor after He passed away. I assume He had prepared Shoghi Effendi with that in mind.
I don't know if you want more information but please let me know. It's not an issue for us as we trust fully both Baha'u'llah's and Abdul-Bahá'í judgement on these matters.
Again, there are are secret forbidden topics. As far as women not being on the House of Justice we don't know the reason, Abdul-Baha said it would become clear as the noonday sun in the future but until then we don't know why.