Alta
My personal opinion is that a tarot app or using scans (shuffling a deck you have then using the scanned images) should be fine.
Not to sound condescending, but I don't think it's fair for an entire thread to analyze a circle leader's decision, and such things would be better kept between you and them, or the moderators if you wish to make an appeal. You already said you respected their decision, but it is one thing to ask a theoretical question, quite another to "take them to court" as I feel this thread is going.