Yes, Great Expectations is fiction, but it described a phenomena that exists in reality. Grenfell Tower, as it is, is an example of such a phenomena. You never forget or cease mourning the person(s) you have lost, but in the midst of life is death, death must come to one and all. To quote a Benjamin Britten opera, but we must continue to look forward and live our life the best we can for those with us and come after the tragedy.
Grenfell Tower, standing in all its ugliness, constantly pulls people back when they need to move forward.