Every project sustainability is very much dependent on how their platform performs it is just right for the development team of Ethereum to delay launching if they think there are still bugs nobody should pressure Ethereum, the developer team knows that there are a lot of competitors and they want to make sure that things will go smoothly when they launch still enough time for investors to buy more Ethereum for preparation for the coming POS feature.
I agree with your opinion. I think the most important reason why the ETH developers team still hold the project is that they want to make sure everything goes right. ETH 2.0 is an important event for Ethereum particularly and for other projects generally. It carries such a great effect to the market, though, it's better be perfect when it launched!