I did once enquire at the local casinos (UK). They were concerned about cheating or card tampering, even though they would obviously be purchasing the brailled cards, not me. I guess they have certified suppliers or something. Then again, this is the gambling industry so it's easy for them to shut down questions like this without having to do much explaining. I once contacted PokerStars to ask about using my screen reading software to access their platform, and was told it wasn't allowed because other players may hear my cards. Other players who are physically nowhere near me would hear text-to-speech coming through my headphones. The loopholes they jump through for tax purposes often mean they're also completely outside the scope of equality laws.

Sadly