As both a tahini lover and seed oil disrespectooor, this is a question I've thought about more than I care to admit.
imo, the tentative answer is somewhere in the middle. With the caveat that I'm not...
To me, tahini is as much a seed oil as peanut butter is (I mean real peanut butter - just ground up peanuts). I wouldn’t expect unrefined, natural oils to cause a problem in one’s diet.