They may feel that seeking spiritual help for their friend would violate an unwritten code of silence; therefore, they refuse to speak about the matter because of a misguided sense of loyalty.
وَبِفَضْلِ ٱلْقُدْرَةِ ٱلَّتِي تَمْنَحُهَا قُوَّةُ ٱللهِ ٱلْفَعَّالَةُ ،‏ لَا يَخَافُونَ أَنْ يَكُونُوا مُخْتَلِفِينَ .‏