As I see it, the hymn expresses pilgrimage, along the Christian path, towards the Life we shall inherit. It is perfectly apt for the funeral of anyone who has tried to live their spiritual life with faith in the hereafter. How absurd to criticise a choice of hymn by a person for their own funeral! What do you propose? An exam (set by you) to verify their fitness to qualify for the singing of each hymn in the service? What cheek!