Yeah your right the tooling for .net stuff is more integrated so is a lot more seamless. But I think with maven or gradle it takes at least some of that away.
On the other hand we just moved from maven to gradle at work so have some older maven projects and some newer gradle ones all living side by side. I quite liked the way with more of a set of tools rather than a monolithic tool let you can pick and choose your toolkit to use the best ones that fit you. That doesn’t mean eclipse is fool proof and integration can be flakey but its nice to know if the community decide there is a missing feature or missing support they can add it. Relying on what Microsoft decide is important is far from ideal.
I think the differences are more ideological than anything else.