thus keeping fiat involved in the debate.
if however we were to measure bitcoin directly against COL(cost of living) like measuring bitcoin as 450 loaves of bread. with no mention of fiat, then there would be a point.
Everything can be priced in everything else. Fiat is simply the easiest at the moment because everything else is currently priced in fiat.
If we, as you wished, used the BigMac index instead, people would just be forced to do the math in their head to figure out the price...
If it doesn't happen organically, it's just another fiat currency.