Not much of a case there.
Your fear that the staunchly held faith of hundred of millions of Muslims in Pakistan can be jeopardized by one young woman not being able to understand the importance of marriage is simply FALSE. What people do inside the privacy of their homes is nobody's business but their own, whether it is halfway across the world or just next door.
Case has already been established and won. You are just summersaulting around it for no reason really.
Your fear is that narrative your kind build around this character under discussion is getting ripped apart. I do sympathise with you, not a good situation to be in when so much investment go down the drain.
Ofcourse, everyone on its own. Privacy is only good when it remains private. And thats what our religion say as well, keep your bad deeds to yourself, don't boast about them. So if this character has been "assigned" and "imposed" upon people of Pakistan , as some sort of their spokesperson, giving views and ideas about Pakistani society, then sorry, NO, you cant just utter such non sense like "why marriage, why not partnership?" This is propagation of illegitimate relationship, STRICTLY forbidden in Islam and Pakistan own social setup. When is person has been "assigned" a public figure role, every utterance can influence feeble minds. Can you imagine a politician like Imran khan say same thing , "why marriage, why not partnership"? That will be career ending statement. Funny thing is, he is actually accused of having illegitimate child, but you dont see him justifying it, advocating it. Because it is what is, a wrong act.
Yes, keep your filth to yourself, keep it private, do not try to justify it just to massage your rebellious nature , specially when it goes totally against divine laws. This is true for every individual , and those who are public figures, they MUST BE castigated for trying to spread such filth through their words and ideas.
Your assumption that a university going, noble prize winner, born and bred Pakistani is naïve not to understand the significance of marriage, specially in Islam, in Pakistan and in Pakhtoon culture as well, and top of that, because of lack of education, believes in illegitimate relationship instead, I am afraid you are just making an absolute fool out of yourself. And if there is one in million chance that this person do not actually know what marriage is in Islam, then this person should be not allowed to be a public figure.
Your enthusiasm of standing on the wrong side of the fence is amusing though. I take you need these type of public characters to endorse what you , yourself believe in. Trust me, non of us is an angel. We just cant fight divine laws. We might not be playing by these rule in our lives, but we cannot challenge these laws in any shape or form, in any capacity, at any level.