If I see a 70 year old billionaire with a 25 year old beautiful, slim model type of woman, my first thought is that the money and lifestyle is the main attraction. Nothing says that he can't be witty, charming etc. But do you really think a slim, beautiful 25 year old would go out with Fred from number 73 in Hull if he was witty and charming? I think the percentage of that happening is very slim.
No, I do agree when you have extreme age gaps and when you get people from poorer countries who quite likely see an ordinary person they meet on the internet - and whom they instantly declare to be the love of their life, in spite of stark differences in culture, age, circumstances, language etc. - as little more than their passport to a wealthier, more privileged country.
Also, when you have somebody like the extremely famous nonagenarian billionaire who recently got engaged for a short time before 'dismissing' his intended - who is very widely known for being, shall we say, not the most pleasant person you could meet - it looks quite conclusive that the money is the main/only draw.
I just think that, when you have two people of a similar-ish age, from the same country (or two countries with similar cultures, same language), similar 'status' in life, a lot of positive attributes to offer each other (albeit not the same reciprocal things).... I wouldn't jump to that same conclusion at all. Just because the woman in this couple clearly doesn't see male-model looks as an essential in a partner, that in no way means that she only loves him for his money.