I’m going to preface this with saying I don’t support communism or centrally planned socialism, so this isn’t me handwaving things away. It’s just that this is a nuanced topic and definitions are important, and the red scare has sucessfully lied to most people about what these words mean.
The government being in control of everything is not the sole defining feature of communism. Socialism is where the people own the means of production (business assets), typically through the government owning it all. Communism takes that a step further by removing currency and markets from the system and using some other system to determine how to create and allocate goods and services. And for the people to own the means of production through the government, they need to have an actual say in the government.
Basically to have centrally-planned socialism or communism, you need the government owning all business assets in addition to something like a democracy or republic form of governmental policy. If you don’t have a governmental policy that is controlled by the people, then the people don’t own the means of production and by definition you don’t have socialism or communism. You have one of the various forms of autocracy/oligarchy/etc.
The issue we see here with people conflating modern day China, the USSR, etc with communism is that the change in government started out as socialist or communist movements, but then got coopted by fascists who removed political agency from the people, but also decided to keep calling themselves communists. However, overthrowing a form of government and pretending you’re still that form of government doesn’t magically make it true. North Korea isn’t democratic or a republic just because the rulers call themselves it. Similarly, China’s government is defined by its actions: state capitalist and not communist.
The “atheism is just another belief” talking point is popular in religious circles because it’s a little mental game they can play to try and make their lack of evidence equal to someone saying they lack evidence. They frame atheism as an assertion that no gods exist, which is therefore equal to a religious person making the assertion that their god does exist. We know that in reality, lack of belief in something (anything) is passive and the default (I’m not gonna believe that lizard people live in the sewers unless you prove it to me), but they try to frame it as an active claim because then it’s just a bunch of people claiming different things.
It’s just another form of deceit they wrap around themselves to hide from the fact that they have no actual evidence of the divine existing.