Probably so they don’t have to pay taxes on profits. I know that I would love to avoid paying tax on bitcoin when I sell. I’ve been HODLING many coins for over 7 years, it doesn’t feel fair that I should have to pay 20% tax on profits.
I also agree the tax are kyc dreaded side effects, but in my country, right getting the eye of the federal government and even economic and financial crime commission eyes on you are also why people don't prefer KYC, lately the central bank of Nigeria governor advice against the use of crypto-currency saying it's a tool that brings about crime, KYC makes people vulnerable to the federal government in my country and can they can go as far as an arrest.