I'm not sure why psychics, tarot readers, clairvoyants, empaths and the like get "debunked" as cold-readers, as if that's a common skill.
Being a cold reader is very impressive on its own. It means you can pick up someone's thoughts or feelings from their body movements and how they answer (more than what they say) alone. Even if psychics are fake they can sometimes tell people exactly what they needed to hear. It's a bit like an untrained therapy.