(Please don’t reply to this with your anecdotes about the time you had a bad experience at the Apple Store. I’m not saying they’re perfect. But these situations in the OP are rare.)
That said, not everyone needing support has access to a Genius Bar, and not every Genius Bar employee knows every possible answer to every possible question.
But, to claim they chose to be insulting is just mistaken.
Someone made an absurd statement to you about Apple, so you have spent the last fourteen years trying to avoid conversations with people who like Apple products?
It's not rare to read comments to the effect of:
"Why are you, a single person, doubting the decision a trillion dollar company? Certainly they know best".
edit: Algolia for the win. Quick search [1] returned this pearl from 7 days ago [2]:
> What would you have them do? Sacrifice a trillion dollar business in token protest? You’re just a keyboard warrior with no point at all who would make the same choice and justify it the same way you imagine I do if you were ever in the position they are.
[1] https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
This example demonstrated to me that Apple is a religion, after many other examples. Try reading Apple's blogs, it's crazy.
I recommend not trying to talk to extremists in any area. Your life will be much better.