Identity is a journey, not a fixed badge, and rules should honor that. If a switch follows the rules, chasing a better World Cup shot is fair and honest.
Identity isn't a passport you auction for a better World Cup; pride belongs to the flag that raised you, not the bench that hired you.
Within the rules, switching can serve the common good by letting talent flourish on the biggest stage. Do what you can control: strive with virtue, and let fortune weigh the rest.