The former has a limited downside, the latter unlimited. Whatever the Central Committee decides happens to you is law with no recourse - execution, disappearing and re-education, etc. - and law enforcement and the courts are just there to justify it after the fact.
It’s clueless to publicly mouth off about the CCP if you’re a high-profile influential Chinese billionaire and therefore a potential threat to the current ruling faction, or some future ruling faction when there’s turnover. Discretion is definitely the better part of valor there.