So akhan do you mean that as we learn more about "other" fields we risk not having as much expertise on Islam itself?
I guess I feel that we need to stop separating everything into " Islam" and everything else. Islam is our everything and thus we can see it in everything we study - I think that's why you hear of such amazing scholarship in the Golden Age of Islam, with people studying everything from history to poetry to astronomy to engineering, and rather than thinking of these subjects as outside "Islam" they were thought of as part of life and thus part of Islam.
The Golden Age was the Golden Age because there were scholars who could deal with the dunya from an Islamic perspective. In this age, don't we see most of us going either this way or that. Very very few actually achieve perfection in both fields. We also have Sheikh Googles and Mufti Wikipedias and that trend is going anywhere but upward. The prophecy is going to come true without a doubt. The only question is when? With the kind of signs we see around, it won't be long I guess.
Btw, I'm not saying that we should stop everything else and just focus on Islam. It would be stupid to do that. I'm just saying that knowledge will disappear whether or not anyone likes it. You can't deny what has been decreed, right?