> We don‘t want to colonize space

I do. Plenty of people do. Plenty of people also think exoplanet science is useless. I disagree with them. It the arguments are symmetric to those against human spaceflight.

> certainly not an engineering challenge

…how? We don’t have the technology to do this.

> There is no reason for humans to live anywhere other then on Earth. We have more reasons to live on Antarctica or the deep ocean then on the Moon, Mars or Alpha Centauri

Strongly disagree. You’re describing disrupting biospheres.

> None of these would benefit from having a moon base

Of course it does. ISRU (and baseload launch demand) decreases costs of access to deep space.

> diverting funds away from missions with more chance of success and more scientific value

The science slakes our curiosity. The engineering slakes our needs. And they both benefit from each other. Claiming Starship and in-orbit refueling won’t benefit scientific missions is myopic.