I think that people who have barely heard of bitcoin know that there will only be (approximately) 21 million or at least that its supply has strict rules that do not allow absurd jumps and is decreasing. So, going from 21 million to 21 quadrillion, overnight, especially in a currency that is known for not being able to be created out of thin air, even if it is a mere nomenclature, seems to me to be a greater detriment to adoption than making people understand that 1 BTC = 100 million sats.