I find it curious. Socionics theory says "true love" may only be possible between duals. Yet observing history, it's rare to see famous IEEs married/whatever to SLIs.
One thing I've noticed is that intellectual IEEs seem to get along better with SEIs than with SLIs. An example of this could be Thomas Huxley, who was married to a SEI. Even though semi-duality causes friction from time to time and certain level of discomfort (there is one famous quote about him cheating), there is no doubt he loved his wife very much. And his wife loved him even more.
I wonder if the intellectual stereotype doesn't fit the delta picture and IEEs are at risk of giving away a fake alpha image, which ultimately turns off the natural attraction between duals. I'm even more interested in your opinion that IEEs make excellent physicists, an area which doesn't seem to have anything to do with Fi. Could it be that deltas through the history have never developed their own way of intellectuality and instead adopt the ways of other quadras?