Is it not injustice when a person becomes a Muslim at the age of 60 and starts life without a sin like a baby?

There are some righteous young people who remain righteous when they get old. What is the state of a person who becomes a believer at the age of 60? Such a person was a Christian, atheist, deist, etc. until he was 60; then, he became a Muslim. Is it not injustice? Such a person can start as a sinless person when he becomes a Muslim after committing so many haram deeds.

Dear Brother / Sister,

It is more difficult for a person who lives in an environment of unbelief and sins to get rid of them and to choose to become a believer than a person who lives as a Muslim in an Islamic environment; therefore, Allah rewards such a person.

Questions on Islam