Last week R' Elyashiv had heart surgery and the Charedi press had extensive coverage. Mishpacha (Hebrew) had a number of articles about the surgery including a profile of the surgeon. They flew in the top cardiac/blood vessel surgeon from Cleveland (a religious Catholic) to do the surgery.
The question I would like to ask is why was that necessary? The prevalent (only?) Charedi hashkafa today is that not even a leaf falls without it being a גזירה מו שמים and that השתדלות has no effect, it is just an illusion. השתדלות is just so that we avoid ניסים גלוים (see מכתב מאליהו, חזון איש אמונה ובטחון and others). If so, shouldn't bringing the top surgeon be too much השתדלות and a lack of בטחון? After all, Hashem is doing the healing not the surgeon and once we have done our השתדלות, going to the doctor and having the surgery, why should it matter whether the surgeon is the best in the world or simply Joe surgeon who is competent? As long as we do our השתדלות to avoid requiring a נס, the rest is a גזירה מן השמים. If the גזירה is that the surgery will be successful, then it will be successful even if done by the average surgeon, and if the גזירה is that it won't be successful then it won't help that you have the best surgeon.
In fact, what does it actually mean that someone is considered the best surgeon? After all, הכל בידי שמים, our success is actually an illusion to make it look like it is our skill. In fact, our success in worldly matters is simply a גזירה מן השמים so the fact that he successfully operated is not due to his skill but due to the גזירה מן השמים.