Ask HN: How can binance block crypto transactions when crypto is decentralized?

Binance is blocking certain users (linked to Russian government) (1) How is this possible when crypto is supposed to be decentralized? Can those users not access their wallets bypassing Binance's controls?

(1) https://cointelegraph.com/news/binance-blocks-crypto-accounts-of-relatives-tied-to-the-russian-government