[b_t_s]

Safest from a corporate liability perspective, not from an inadvertently killing kids perspective. What you're suggesting is precisely what substantially all brands did with sesame, and it's why my family stopped eating hamburgers and hotdogs for several years...because we were literally unable to buy buns that would reliably not kill my daughter. The bread situation was almost as bad. We eventually found 1 brand available at 1 store and were able to feed her sandwiches once again. Now it wasn't much of a risk for our family because we understand how deadly allergies can be and we read ingredients carefully. But for kids whose parents are less careful, some of them die, particularly when there are zero safe options and you don't know if manufacturers are really adding the allergen or just saying they do for legal reasons(both were common). And it sounds like you may be referring to the common belief & research around early/small dose exposure helping kids avoid/outgrow allergies, but what's often lost in those conversations is that it sometimes works, and sometimes makes the allergies worse or even kills you, and nobody has the faintest clue why or which will happen to you. That's why the research generally includes allergen+medication, because the medication is necessary to avoid accidentally killing some percentage of the patients.