I agree. It with TB. When one changes outfits or puts certain clothes on to do certain activities, it creates a psychosomatic shift that some come to rely on (ie..they can't read with out the right jewelry).
When you go to work you wear certain clothes, when you go "Out on the Town"..ect...
It allows people (that follow this practice) to focus "subconsciously" on what they are doing.
Hence the purpose of Ritual and Ritual Clothing. What one "Does" does not require the ritual, but as you change clothes, and put on the jewelry, the ritual acts engage the subconscious and superconscious in what is about to take place. The same level of focus is attainable with out such Rituals, it is just a matter of Perspective (as is much of life)
In agreement with TB, the "Atmosphere" that you create with clothing and certain props (a nice casting cloth, candles, incense) engages the Quarent on a "Deeper" level. Instilling a sense of faith and belief in what is about to take place. Taking down unnecessary walls that may pop up to block their focus on the reading if you were to just read in normal clothes.
You would be more trepidations if a doctor worked in flipflops and T-shirt, or a lawyer showed up to court in a Hawaiian shirt and shorts, then if they showed up looking like you "expected" them to look.
Its a Tool to be acknowledged and used (if you see fit), nothing more. Just like some people feel they "Need" crystals ...
I also agree with TB on the note that you don't have to go quite as "campy" as some (unless that is your heritage) You can Make it more professional (I like the all black look TB was talking about)... But Like TB said. You are a professional, a Tarot professional, The outfit is only to instill a sense of confidence in the Quarent on a psychosomatic level.
Mental Triggers are powerful... and some are Very ingrained in society, and how they see Tarot Readers and Psychics. Embrace this hidden power to your advantage... and tweek it to your "Personal Style". . . or not lol.
Love and Light ~