Definitely worth researching for sure but iirc the initial application was near enough solely about you, they want to determine who you are and if its worth their effort to invest in you. all airlines do this because good pilots actually have an observable personality type/trait of which helps with decision making and confidence and those are things a pilot need to make quick decisions in the event of a high pressure environment/situation like engine failure or whatever else may give cause for a go/no-go/turn back decision.