Allergies are caused by proteins, not oils generally, so peanut oil is safe for almost all people with allergies, although culturally, peanut oil just isn’t that used much anymore because most businesses want money from as many people as possible and don’t want to risk people’s lives out of economic principles.

This is the issue with libertarianism. The argument is always an attempt at framing the conversation to an acceptable level of death in the name of expanding markets, without realizing that death actually limits markets.