In مَنْ تَرَكَ الْجُمُعَةَ مِنْ غَيْرِ ضَرُورَةٍ, the condition is not merely “missed Friday prayer” but “missed it without necessity.” That qualifier matters both for the ethical warning and for proper legal understanding.
لَا يُمْحَى وَلَا يُبَدَّلُ combines two negative verbs to intensify the permanence expressed by the warning. Recognizing the rhetoric does not grant learners the authority to pronounce final religious judgments about individuals.
The practical outcome is to take Friday prayer seriously and learn the relevant rules concerning obligation and legitimate excuses.