You are just doing what i criticised. You are cherry-picking instead of acknowledging the protests as a whole.

Freedom of expression was one of many goals. And the protests were caused by the capitalist reforms, which gave rise to people demanding freedom of expression to be able to express their anger over the consequences of those capitalist reforms.

https://en.wikipedia.org/wiki/1989_Tiananmen_Square_protests_and_massacre

The protests were precipitated by the death of pro-reform Chinese Communist Party (CCP) general secretary Hu Yaobang in April 1989 amid the backdrop of rapid economic development and social change in post-Mao China, reflecting anxieties among the people and political elite about the country’s future. The reforms of the 1980s had led to a nascent market economy that benefited some people but seriously disadvantaged others, and the one-party political system also faced a challenge to its legitimacy. Common grievances at the time included inflation, corruption, limited preparedness of graduates for the new economy, and restrictions on political participation. Although they were highly disorganized and their goals varied, the students called for things like rollback of the removal of “iron rice bowl” jobs, greater accountability, constitutional due process, democracy, freedom of the press, and freedom of speech. Workers’ protests were generally focused on inflation and the erosion of welfare. These groups united around anti-corruption demands, adjusting economic policies, and protecting social security. At the height of the protests, about one million people assembled in the square.

China was already state capitalist by then and people protested that.