It's possible to have some distance from research without claiming that one's view comes from "outside", which, as I think you're pointing out here, isn't possible. There is no view from "outside", especially in social research.
I think distance is healthy, because becoming overly invested in the outcomes of research really begins to introduce some trouble. Being captured by one's cause limits what they're willing to say. I don't think it's as simple as saying, for example, "well politics is always a part of research, so let's throw measured analysis out the window!".
But yes, we have different epistemological stances, and that's fine. I would consider myself more of a critical realist--there are, objectively, mechanisms that govern social relations, but there's no "view from nowhere" that can fully capture it in a holistic/detached way. Nonetheless, it is good to have some ground rules around how far one is willing to become personally captured by their research and participants.