Oh, I remember quite clearly what Matt Ryan said, and yes, you're right, I misquoted Matt Ryan what I said above about arguing canon at the table. That quotation happened later in the thread, and was from Timothy Ferguson.
Your assertion is disingenuous, Matt Ryan never said that arguing RAW was nonsense in the post you are referencing. He did say that if the troupe didn't think Hermetic Virtues like Mythic Blood or the Gentle Gift should be taught, then it shouldn't be taught for your saga/troupe. He said absolutely zero about arguing RAW here (wherever here is) as being nonsense. As with anything House Rules trump regular rules. But the forum doesn't deal in House Rules, typically, at least not with a clear understanding that it's a discussion of House Rules.
But as for canon and RAW, discussed here in the forum, yes, any Hermetic virtue can be taught, and here Matt Ryan makes a good point on why he made it that way.
Here's the post to which One Shot is referring, I'll leave it as an exercise to reader as to whether he said what One Shot says he said, I obviously (strongly) disagree with One Shot's assessment.
https://forum.atlas-games.com/t/intellego-and-warping/142/1