Value the people doing heavy lifting

The speaker shares experiences from two jobs: working in a garden center and unloading lorries. In the garden center, the speaker enjoyed making tea and watering flowers, emphasizing the importance of making colleagues happy. In the lorry job, the speaker learned to appreciate the hard work of others and the value of teamwork. The speaker highlights the significance of appreciating less glamorous work and ensuring the happiness of those around you for overall success.

Why does the speaker emphasize the importance of appreciating others' work?

What does the speaker suggest about making the workplace happier?