The resurrection to come is in Truth a necessity.
It is necessary that ALL be resurrected. Not a single soul will be overlooked or forgotten.
It is in The Law.
https://gods-kingdom-ministries.net/daily-weblogs/2017/09-2017/first-corinthians-15-adam-and-christ/
Our existence and the lessons we learn are often very painful.
It is difficult to imagine at times that all that we observe and experience is for our benefit.