Social media is a conversation, not a broadcast
Many businesses treat social media like a billboard: they put content up and walk away. But the "social" in social media is the whole point. Community management is the practice of actually participating — replying to comments, answering messages, thanking reviewers, and joining the conversation your content starts.
Think of it this way. Posting is you talking. Community management is you listening and responding. A business that only talks feels distant and corporate. A business that responds feels human, present, and worth trusting. On platforms built entirely around interaction, refusing to interact is the loudest possible statement that you don't care.