I have come across many sentences where the author names the subject, and then emphasizes it with eux, although I would see no need for disambiguation.
Examples:
- Ses agresseurs ont, eux, écopé de sept ans de prison. context
- Les volets, eux, se ferment automatiquement. context
- Les Français prennaient le sexe au sérieux. Les Britanniques, eux, préfèrent en ricaner.
- Les gros, eux, passent toujours à travers les mailles du filet
Why is eux being used in these cases where the subject seems clear? Is it for emphasis?