Bolding mine...
You'd think but audiences are so helpful I can see how it may be continuously reinforced..
Anecdote: I used to read Tarot cards. Never believed in it, just thought they were cool looking and was interested to understand the woo behind them. Started reading them for friends (whilst always pre-stating it was nonsense) and kept getting amazed reactions at how accurate my readings were, how close the cards fit, how I'd said stuff I couldn't possibly know etc. Were I inclined at the start to believe, then several readings in I'd have had that firmly reinforced. As it was, I was able to spot that most of the time they were throwing the information at me, or working to fit the statements I'd made to their situation and the stuff I'd fed back that I 'couldn't possibly know' they'd actually told me themselves, literally moments earlier on a previous card.
Even when I explained this back to people, some still insisted I 'had the gift', that it couldn't explain everything I'd read etc. It was a fascinating insight into how, otherwise intelligent people, can be swayed in to pattern matching and making things fit. I stopped in the end because it was having the opposite effect of the fun debunking I'd had in mind.
To counteract the above, I'm not sure how anyone can read a book on Tarot cards and not realise it's nonsense when they literally tell you "This card means x...unless from your knowledge of the person that doesn't fit, in which case it means whatever you feel it means" or words to that effect. Oh and talking of 'means x' - that's usually a long list of things that could fit any situation eg, you may think drawing 'Death' was bad news but it can just mean a change, or the end of one phase of your life. When I was explaining that to one person I was reading for, they immediately leapt in with 'I was thinking of changing jobs. That's incredible, how did you know that!'