bitcoin is techically more superior then ETH ,yes but the use cases are bigger for etheruem now!
real utility for ETH ARE BIGGER.
ETH: defi, icos, dapps, stable coins.
also the very good liquitity !!
BITCOIN ?
yes you can buy thigns with btc but so you can do with ETH.
Well no one is saying you can't buy, pay or shop with bitcoin and Ethereum, there are the most popular digital currency in the world today and payment services are implementing both, they knew not everyone will have bitcoin only or eth only, Ethereum is more useful but ETH still depends on bitcoin for some reasons, no matter how much you dislike this it's the truth