This is an article with a long introduction and then jumps straight to the point in one, final paragraph: Russia is abusing it for political messaging again. While yes, any tool will be abused like this, it really is also a tool to best codify spoken language of the Slavs (in a sense, it is trivially provable that Cyrillic script is better adapted even to languages which do not use it today, but have to resort to dig…
Take a look at the Cyrillic section of Unicode to see your trivially provable claim being trivially disproven. You'll see all the same digraphs, glyphs, accents, graves etc. as used in Latin scripts.
It's also easy to see it easily disproven if you look at all the languages USSR forced cyrillic alphabet on.