Your sentences are understandable, but they could be slightly refined for more natural flow. Here are my suggestions:
1. "No one is sweating because AI is doing the hard work for them."
- Tip: "Working hard instead of them" sounds a bit awkward. "Doing the hard work for them" is more natural.
2. "People don’t need to break a sweat in a highly organized company."
- Tip: The phrase "don’t need to sweat" is okay, but "don’t need to break a sweat" is a more common idiom in English.
Both revised versions sound more natural while keeping your original meaning.