Dude, Rekrunner isn't saying and I'm not saying that USADA isn't trying to catch dopers. They are of course terribly underfunded compared to number of athletes they have to keep track of, but that is another story.
That does not mean that american athletes doesn't dope to a worrying degree.
Neither Rekrunner or I are saying that the US SHOULD be banned. I realize there is a big difference between the state run doping system in Russia and wellfunded sophisticated athletic communities in the US that dope and beat the system because they outsmart USADA/WADA, but none of the above means that the USA don't have an issue with doping.
I'll even give you that Kenya is an obvious candidate to be banned. Not because the state itself facilitates doping like Russia, but because they are horribly underfunded in combination with huge corruption.
Saying that 90% of other doping agencies wouldn't go after someone like Salazar is a simplified statement at best. Doping is now criminalized in much of western Europe for instance and in countries with dubious doping history like Austria you will risk very real jail time if caught. I'd say the first country that really started a "war" on EPO is France. Many countries in Europe test their athletes at a much higher frequency than the US. There are several recent exapmles of Australia catch their own athletes and when was the last time you heard of a Japanse athlete doping?
But still, even though USADA are doing their best I guess, it still doesn't change the fact that when it comes to the US and doping, from this world's alone:
1st and 2nd in the 100 meters in Doha have HUGE asterisk's behind their name.
2nd in the 800m for women as well.
And now all athletes from NOP will rightfully be questioned. (American and none americans)
Not saying that they all dope, but even though I understand why many athletes would want to join that program, I also believe an athlete like Jenny Simpson with a very convincing attitude on doping, wouldn't have run with that group even if she could, just because of the optics if nothing else.
So yeah, If it makes you happy, I'll admit to the US being so big that you also have plenty of athletes that are not tainted in any way. I haven't seen anything to think that the New Balance or Tinman Elite athletes are cheating for instance. I'll even give Bowerman Track Club a pass for now even if there are some red flags.
But athletics in the US has and have had a significant doping issue for ages, more so than almost any other country on earth. Fact.