Yes, @rockymtnhigh, anyone can elope. Nowadays, however, you can’t elope and marry in the Catholic Church. So, if both members of this couple are practicing Catholics–and it certainly sounds as if they are–they can’t marry in the Church for at least six months and would be committing a mortal sin if they married outside it. They both know that and it doesn’t seem likely to me that they will just ignore Church teaching on this.
Now onto the “smart women can be intimidating” stuff.
Those articles leave out a very important fact. It may not be PC to say it, but while the median IQ of men and women in the US is about the same, the distribution of scores varies.
Thus, quoting Wikipedia:
See https://en.wikipedia.org/wiki/Sex_differences_in_intelligence
This difference in distribution also shows up on certain standardized test scores. While the difference has shrunk, males make up a higher percentage of those with perfect SAT scores than they do of test takers. Among LSAT test takers, males also make up a higher percentage of those with 175-180 scores than of test takers.
So @Magnetron your D doesn’t have to settle for a guy who doesn’t mind being married to someone who is smarter than she is. If your D has an IQ above 150, there are more men than women in that category. If her IQ is above 175, she is one of a very small pool of women with a somewhat larger pool of men.
So, believe it or not, an exceptionally smart woman has better odds of meeting a man with an IQ as high as her own than an exceptionally smart man has of meeting a woman of equal intelligence if you just look at the numbers. A man with an IQ of 180 who wants to marry a woman of the same degree of intelligence actually has fewer potential matches.
Of course, it’s more likely that a woman who isn’t as intelligent as he is would be attracted to him than it is that a man will be attracted to a woman who is more intelligent.
But that’s not the same as suggesting that an exceptionally smart woman won’t be able to find a man who is as intelligent as she is.

