Bitcoin started out as a toy with no value, even perhaps a proof of concept, which eventually gained value and began to be traded. Even years after its' creation people gave it away for free, there were faucets. The creator disappeared and the protocol intentionally has been designed in such a way that making changes is difficult and there's a lot of veto power by users.
Ethereum has nothing like the same origin story. There was an expectation of value from the beginning, Vitalik is still around, and there are often huge centralized changes like PoS, the DAO rollback, etc.