It is not just the United States. And in case of US, I am a bit more lenient, because their squad do have 3-4 players with American citizenship. That is not the case with teams like Oman, United Arab Emirates and Hong Kong. The entire squad is made of foreigners, which defeats the very purpose of forming a "national" team. How can you call a team that comprises 100% of citizens from Pakistan and India as the UAE team? Just because some of these players reside or work in the UAE temporarily, a UAE national team can't be formed from them.
I absolutely agree with you, that the situation in the United States is better compared to UAE, Oman, Hong Kong, etc in cricket. But it is still not OK with having only 3–4 native players on the national team.
But I see what you are trying to say, everything is not going to be fixed suddenly. Maybe if the other teams look up to the USA team and maybe if the ICC makes a rule that there have to be at least five native players in a national team, it is going to be better. At least far better compared to what is going on right now.
Most chances we will not have any solid policy from ICC in near future because right now ICC have good incentives from the Gulf region, so they are also paying back something which is giving them some advantage in case of the USA we can expect things could be better in near future, but Gulf countries will never follow these rules, and they will go with players which are mostly adopted and if you want to fair policy then surely we need to move ICC headquarter from DUBAI to any other place which will be acceptable for all and also give some benefits to them as well as they have in DUBAI.
With mostly European and other countries are having better things which can bring changes in any game with their strong domestic system but here right now we have nothing positive which will give any positive sign so just wait and watch this all for few more years.