Based, nope that is not why, the elders in the case of Rer Dalal considered other Rer Dalal family and thus were against this, there is also some sense to it, because back then if you marry a Rer Dalal she is still within her family and wield some power both in the relationship and outside, but if you marry say a Majerten you can have more wives and she will have no option but to accept it. This is why it is best to marry outside the clan or at least the subclan, it gives you the window of opportunity for polygamy.
why do you think we are Laandheere ? because our grandfathers had several Ogaden, Majerten and other Marehan wives, had they married Rer Dalal there would be a lot of fuss interrupting the baby production.
Na iga fuq.
