Here, I found an article that can explain it if you're bothered to read it. Explains very well the point I'm trying to make:
https://www.sbnation.com/2018/2/17/17022884/usa-russia-hockey-score-results-olympics-2018
"The KHL isn’t exactly a competitor for the NHL, but it’s a good enough league (which pays enough money) that some players — predominantly from Russia — have passed up pursuing NHL careers to play there.
Russia’s entire team this year is from the KHL, and it includes a lot of really good players who would’ve been among the best on the ice even if they were playing NHL opposition. The headliners are relatively old: former Red Wings all-around maestro Pavel Datsyuk and Thrashers and Devils sniper Ilya Kovalchuk. But Russia has useful players up and down its roster, almost all of them from two KHL clubs: CSKA Moscow and SKA St. Petersburg."