Are we talking Ni or Si here ?I think Ni likes to focus on how some parts of objects relates to other things. To bring all the little details into focus is to overwhelm the mind. Imagine each piece is related to Nth number of other ones. For every single piece you integrate into the model, the number of related pieces goes up by the power of n. A computer has difficulties handling such inputs, let along the human mind with our limited discrete memory.
With Ni, I don't really mind having too many details to deal with, because I've developed tactics to deal with them. For example, I have learned how to discriminate between the important details and the less important ones (for example, recognise the main tenets of a theory from the tangential ones), so that I can focus on only the important ones at first. And if there really are too many important details, then I just pick some of them to work with right away and I put the others on a shelf so to speak, and I trust that I will get back to them sooner or later.
But I don't know how to do that with Si. I don't know how to recognise the important sensory inputs from the non-important ones, and I don't know how to selectively pick some and how to dismiss others. So I have to deal with them all at once, and obviously I can't do that, so my mind quickly explodes.