I agree with you, there will be a lot of bitcoin maximalists here who don't like that fact, but there's no denying that ethereum's profits will be bigger than bitcoin's these days. Bitcoin is getting bigger and safer, but that will also prevent bitcoin from generating huge profits as before. And it can be said that Ethereum is a perfect choice for those who want bigger profits while still being safer than other altcoins. I believe everyone realizes that, and many people are also quietly investing mostly in ETH instead of bitcoin, but many people don't want to say it.
There is a lot of belief about that possibility among investors that they will also consider Ethereum as one of their long-term investment assets. Bitcoin requires a lot of money to provide very high returns for its holders due to its high price, but Ethreum is still relatively cheap and has the potential to provide higher returns than bitcoin.
But on the investment side, you shouldn't just fixate on the potential returns you will get, but you also need to understand the level of security you have on your investment assets. Bitcoin is safe as a decentralized asset, it supports your financial privacy, while Ethreum does not.