Yes, spreading the language creates a lot of opportunities. But not the script. Tadjiks are taught Russian. Both languages use Cyrillic, but in another country with different language but same script, you'd be almost as helpless as transitioning between Cyrillic and Arabic (Iran, which has Farsi, which is almost identical to Tadjik).

And in this regard, the west should be happy: Russia has poor culture of spreading its education. In Central Asia, Turkey has put a lot more effort in building and financing its schools and universities, where they teach English and Turkish. Putin's Russia is just ridiculous in this sense: it keeps "Houses of Friendship" with balalaikas, bear mascots and free vodka on holidays.

One of my friends hitch-hiked from Russia to Iran in the mid-2010s. Despite the countries being sorta friends, he had to speak with the local in broken English, not Russian. That's just ridiculous. Another friend hitchiked to Tajikistan, and there they do learn Russian at schools and can have a bare minimum of a conversation.