I don't understand how this is any different than what is done with PEDs in the US, where our professional athletes just blatantly cycle through different types of PEDs depending on what is or is not being tested for, they just do it under their teams supervision as to make sure to not run foul of the regulators. Literally the entire upper echelon of the professional biking world (including the entire US Postal service team) was shown to be doping little more than a decade ago, a better question is why should Russia even care other than to just do the bare minimum to pay lip service to western standards of 'fair-play'?
Is it just because it is unsophisticated that it bugs you?
What I mean is that they clearly aren't doing much to actually hide the fact that they don't really care about the samples. Having equipment and testing supplies is not that sophisticated if you aren't bothering with a large public media charade. Hell, I have never even tested positive for THC byproducts on a job screening despite being an avid smoker for the majority of my adult life. People just don't really care as much as they used to about this stuff. It's all very clearly a ruse for rubes and insurance companies.
Not only are they probably aware that many people are doing it, they likely aren't paid enough to care, and if someone wants to slip them more money for something higher risk, why should they care?
Intravenous steroids is not a 'hardcore thing' it is the fundamental basis of pretty much all of amateur and professional body building culture, and much of top-ranked college and highschool athletics. It's basically ecstacy for athletes. Not everyone is on it, but if you are in the scene long enough you will know where to get it if you do want it. Most professional athletic organizations literally have steroid cocktails that they administer to their star players in the event they are injured. It's one of the reasons why ligament and tendon injuries are so prevalent in today's athletes, their muscular development is not in sync with their connective tissue development, which leads to devastating injuries. They are more sophisticated about it than they were before, you will rarely see huge hulking athletes way outside the statistical zones, but they will ride just into the freak athlete territory to be noticed. As well PEDs don't automatically make you a good athlete, you still need to train diligently, especially at a young age, to be really good at the thing you are doing, which is why most players don't really care if you are on them. It's pretty ingrained into athletic culture at this point. It's always 'not everything is as it seems'.