None of those countries (well probably except China) have any significant launch capacity to deploy constellations

They can build it in a few years though. It takes money and can be done overnight but there is nothing about that that costs 10 years. 10 years got to the moon - from a much lower base. 10 years means you are starting with college graduates and building it from no previous experience - or you already have a lot but only are putting minimal budget into improving.