Three countries (and more really) tried to do exactly that, and they have still not recovered

Their militaries are woefully inadequate, they can’t compete with US/Israeli doctrine directly

There are many reasons why, “top heavy” is simplest explanation; rank and file are afraid of their superiors (rightly so), so they withhold and misrepresent unfortunate news.

This makes modern military operations that depend on adaptability, communication, and coordination very difficult.