St. Paul wrote in Corinthians that not all have received the gift of Celibacy. In a global talent pool, 3000 people who determine it’s not for them is probably not out of the ordinary.
Life isn’t all about *******. There are certainly people who enter religious life and find that poverty or obedience, as observed in a specific order, is not their vocation. There are seminarians who don’t take to the academic rigor.