Literally no one is trying to stop you from stating what you want, you have a keyboard, a pc and internet connection, it is a free world, you do whatever you want with it.
Well I'm hardly claiming I'm being censored or anything, but you seem to be in fairly strong terms telling me that I'm contributing absolutely nothing to discussion.
The thing is you're not the first person to state that alt leaders are generally more unfavorably received compared to brand new civs, and I am trying to suggest a leeway to compensate both sides of the argument: having a new civ/new leader while at the same making that leader an alt leader of an existing civ. Simply saying "I don't want an alt leader thus they shouldn't bother with it," one, adds nothing new to the conversation, we all dislike alt leaders, you're not the unique one here, just simply read the comments on Kublai Khan's thread, and two, instead of coming up with an idea that may make people on both sides of the argument a bit happier, you suggested an impossibility as if Firaxis would admit they waste the potential of a new feature and abandon it altogether. We all have things we want and things we don't want, making extreme suggestions like "I want to get rid of things I don't want" just simply doesn't cut it, especially when that decision affects more than just one person.
I'm "making extreme suggestions"? Uncompromising maybe, but you make it sound like I'm advocating terrorism lol. I have my opinion, you have yours. This logic of telling me not to complain about things I don't like makes zero sense to me. You seem to be saying I should 'moderate' my position, like this is some kind of important political matter. I don't need to accommodate for the views of others in formulating my own views, if I'm not persuaded by them. I never said this involves only one person, others are just as free to express their opinions.
My 'extreme' position is just that I have no interest in seeing more leaders ruling two civilizations, I think it is a gimmick and I don't care for it. The point about them going out of their way is that, in many instances, a good potential leader choice (and yes, that is obviously subjective) may not be a ruler that can be used for two civs. There are plenty of kings that ruled multiple kingdoms, but that doesn't necessarily make them the best choice for any of the kingdoms they ruled. This is like with the gender debate- some degree of quota might make sense, but in general I'd rather they chose female leaders for civilizations where there are good choices. As opposed to having situations like with Gorgo, which to me isn't an interesting choice at all.
Also in general, the whole multiple-civilization thing opens up many problems for consistency. Queen Victoria's United Kingdom included Scotland, so surely she could be a leader for them as well as England? Neither Scotland or England were distinct political entities in her time. You could argue England, the seat of the capital, was the primary realm, but I would say that typically all rulers would have had a primary base of power. You could argue Alexander could also be a leader for Greece, and even Persia and Egypt potentially. He separately held titles for these even, being crowned the pharaoh for instance.
Admittedly Kublai is complicated because even though he moved his power center to China, he was a Mongol. Eleanor I would say is slightly confusing, because I'm not sure if her being a leader of France in the game is to reflect that she was in her own right duchess of Aquitaine, or because she was also queen of France, in which position she didn't have as much influence as she would as queen of England. But I think overall it isn't really clear which leaders do or do not fit this multiple civilisation option.