Uhhhh... you do realize what that statement indicates, right? According to what HOME says, having that mindset is like one who wouldn't be released from the
Halls.
If you haven't been healed fully, you cannot leave the Halls.
You have to be "purged" in completion (a more Catholic line of thinking) in
Tolkien's mind, and such would mean not only over your own wounds but also over how you feel about others' actions against you.
Therefore, healing involves
forgiveness because you cannot heal if you hold hatred/resentment for others. Forgiveness is
never separate from healing. So as a matter of fact, anyone who could not forgive
Fëanor for his wrongdoing would remain in the Halls... because it meant they were not healed. Same as with other characters.