We’ve tried it, it’s never worked, and because it relies on a fundamental denial of basic human freedoms, it will literally never work. The only question is how much misery it causes in the latest attempt.
This is also because China already tried pure communism. There were no corporations, all industries were state owned. This lasted about a decade and was a bloodbath with famines, and almost all intellectuals or people with degrees were executed for promoting inequality by their existence (not kidding - actual history (“Stinking Old Ninth”) - go look it up at your library). Be careful what you wish for when putting communism and inequality in the same sentence.
Do not assume China is the only guilty party. The USSR, as just one example, imprisoned 3,000 biologists for being on the wrong side of an evolution debate for being against Lamarckism. This culminated with banning study of neurophysiology, cell biology, and other fields. (The “Lysenkoism” purges - showing that, ironically, communist countries are among the most dangerous places to be a scientist.)