You are ignoring my argument and the halacha. Yes, if it was clear AT THAT TIME that person didn’t mean it when they verbally accepted ol malchus shomayim, then it is not a good geirus. However, if it was so clear we can assume an Orthodox Rabbi would not have done the geirus.
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It is as clear as a bell that these people are phony. However, rabbis are human. Some are “shudders” corrupt, and will sell geirus, but in most cases the improper gerus comes about because people who grew up in a system where you conned everyone and everyone conned you end up conning a well-meaning rav who grew up in the US or EY or London or Antwerp, in a normal home and normal environment.
That rapper was not sincere from day 1. He was masking a tayva for MZ.
A true ger tzedek does not convert because being Jewish is “cool,” or because of marriage to a Jew. I remember the gerim of old, back in the days before it was “cool” and easy to obtain conversion. They are nothing like the people I know today – the BEST of whom just buys treyf in full view of community members in a store that sells plenty of kosher and raises her children in a certain “movement” that begins with a con – (perhaps because the real rabbonim where she now lives know her kids are not Jewish and don’t want to take them in).