What is the ruling on the ghusl for Friday? And the continuation of the discussion on the ruling of the greeting of the mosque

The Shaykh : This reminds me of another issue related to Friday. May Allah have mercy on you. The issue concerns the ghusl for Friday, specifically regarding his (peace and blessings be upon him) saying: This hadith was narrated by a group of the Companions of the Messenger (peace and blessings be upon him), including 'Umar ibn al-Khattab. He announced it publicly while delivering the Friday sermon from the pulpit. When a man entered—and in one narration it was 'Uthman ibn 'Affan—'Umar ibn al-Khattab, following the example of his Prophet, interrupted his sermon and asked this latecomer why he was delayed. When the man explained his excuse, saying that he had only heard the adhan and performed wudu, 'Umar said: Did you not hear his (peace and blessings be upon him) saying: The discussion ended there. Two groups disputed this hadith. One group said that the hadith, in its essence, commands, and the essence of the command is obligation. Secondly, 'Umar ibn al-Khattab interrupted his sermon to address this man about his delay, and when the man explained his excuse that he had only performed wudu after hearing the adhan, they said: Did you not come until you had performed wudu? Did you not hear the Messenger (peace and blessings be upon him) saying: What did the others say? They said this is evidence that the command is not for obligation. Why? Because 'Umar did not order him to go back and perform ghusl. Look, I say in response to this claim: 'Umar would have had to come down from the pulpit, drag him to the house, interrupt his sermon for the people, and wait until 'Uthman (may Allah be pleased with him) performed ghusl. My brother, is this public announcement on the heads of the people not sufficient? And this is also not something you would know: that the Messenger (peace and blessings be upon him) said, "Whoever attends Friday..." Is this not sufficient announcement that this is an obligatory matter that one must not be negligent about? The point is that if we study the subject of the hadiths that have come regarding the greeting of the mosque, there is absolutely no room for the kind of specificity we have explained—that the Messenger (peace and blessings be upon him) would go from his house to his pulpit. This is evidence that all these commands are not for obligation. A jurist would not say this. This could be a student of knowledge, or perhaps not even a student of knowledge, but rather a novice, a beginner in the pursuit of knowledge. The matter was presented to him, and he derived this weak inference, if not a fallacious one.