Bismillaah, as-Salaatu was-Salaam ‘ala Rasoolullaah
This argument is called “Argument from Authority” or “Appeal to Authority.” This is a fallacy of defective induction, where it is argued that a statement is correct because the statement is made by a person or source that is commonly regarded as authoritative. This is a fallacy because the truth or falsity of a claim is not related to the authority of the claimant.
Islaam does not advocate blind following of any individual other then Rasoolullaah, there’s no Sharee evidence to promote such an unhealthy habit and to give sole authority to an individual.
Allaah says, to the nearest of meanings:
“Say, “Obey Allah and obey the Messenger; but if you turn away – then upon him is only that [duty] with which he has been charged, and upon you is that with which you have been charged. And if you obey him, you will be [rightly] guided. And there is not upon the Messenger except the [responsibility for] clear notification” [an-Noor 24:54]