The reason why I asked this question is because I remember hearing that the Chazon Ish holds that one should not have life insurance because if someone does it could work against him. The reason is that perhaps the reason why he is spared death is because of the financials problems he will cause his family, but now that that issue is no more, he might die”
By that same logic we should not go to doctors, because maybe we aren’t getting too sick because we are needed by our families. Hashem expects us to do our part to remain healthy, and to be able to provide for our families in the event that chalilah we are not healthy enough to survive, or if we should die unexpectedly.