Also consider that Socialism is totally legal under Capitalism. Want to start a co-op? Go for it. Want to legislate and implement socialized healthcare? Many Capitalist countries have.

Under Communism, Capitalism must be illegal and stamped out by force. Want to start a business making shoes and hire someone to work for an agreed upon wage? Illegal.

When the goal involves guaranteeing positive rights, I’m not sure how it can be achieved without coercion. Which is how any socialist policies get implemented under capitalism anyways.