they can interview all they wont. Its a business in the end. Its keeping the flight schools aflot, their HR department and its still encouraging people to spend the money and train.
Passing an assessment and getting the job are two things millions apart.
You can stay in so called “pool” for 5 years, its no harm to anyone as long as you want to think that you’ve got the job and passed your assessment. But when will you actually fly?? Nobody knows. When things come, people like you will be willing to accept any conditions thrown at you, and possibly even volunteer to fly for free like many have done in the past and are still doing it. Its a race to the bottom