In Magic The Gathering, the line is often "Reading the Card explains the Card". And tbh, this seems very self-explanatory, the Cantrip section states:
Bolded for emphasis. Those pact cantrips are not on the Arcane spell list. Neither are they on the Divine or Primal spell lists. So the only way to get them is from the Pact Boon class feature. So at this point it seems like a failure of reading comprehension, which is understandable, but not something I feel is a valid argument.
What is funnier, and probably legal is a 2014 Warlock which does draw from the Warlock spell list. And these are Warlock spells. But I don't want to get into a compatibility argument here