Was it hyper localism in the years between 1776-1930 to have 1 Representative per <=70k citizens. We do not need to go to 5k, and no one said that. But there are ways to aggregate and distribute processes for a larger House, and you have provided no reason for why the current fixed small number of 435 should be preferred, why that is workable, but not 870 (1:350k) or 1740 for 1:175k.

Practically, and with all due respect, you keep stating opinions why it is a "bad basis to run a modern society" but you never articulate why exactly. To my mind, the increased complexity of the world can use more Representatives to work and specialized in more specializes committees.