Personality tests are a method of eliciting the current state of a person.
Current state is a key strategy in business analysis even if the future state will be quite different. You always need a starting point for implementing a change in an organization.
It is the same idea of the current state of a person. It does not say anything about what the future state will be, it is just your starting point.
Benjamin Hardy in his book “Personality Isn’t Permanent” elaborates on this fact.
View personality tests as a starting point not as what is set in stone.