I don't think this is a fair comparison. It's apples and oranges.

Ethereum not only had a premine, but much of that premine went to the foundation dedicated to guiding its further development. Bitcoin was significantly more decentralized from the start, and there isn't a "Bitcoin Foundation" with a huge premine to do stuff like that with. Even the largest bitcoin treasuries, like Strategy, had to buy their bitcoin and the only way they can continue to fund their operations is with their financial engineering---so they may not have the luxury to simply donate their bitcoin to different causes.