No, micro-management is not essential for every hero. While some heroes like Meepo, Chen, and Enchantress heavily rely on micro, many others don't require intricate control of multiple units. It's crucial to choose heroes that align with your playstyle and comfort level, allowing you to contribute effectively to your team.
Practice is key to honing your micro skills. Start by playing heroes with simpler micro requirements, such as Nature's Prophet or Lycan, before progressing to more complex ones. Utilize custom games or bots to experiment with control groups, tab cycling, and efficient unit management. Additionally, watching high-level players and studying their micro techniques can provide valuable insights and strategies to incorporate into your own gameplay.