The kids I see that have peanut allergies lived in bubbles. It seems like it is self-inflicted but I have no scientific evidence.
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There is extensive evidence that the incidence of severe peanut allergies is significantly increased by the practice of avoiding early exposure in the absence of particular risk indicators, which is why that practice is now advised against.(IIRC, some of the first targeted studies were motivated by observed differences in incidence between the US where early avoidance had become common and Israel where peanut-based puff snacks were a common thing to give to babies not long after starting solid food.)
Both will eventually go rancid at room temperature , though highly refined oil has a longer shelf life (both sealed and, even moreso, after the seal is broken.)