[closewith]

> I'm not convinced that money laundering laws mean someone with a legitimate business has to do intrusive data collection to police their customers. If they marketed Airbnb as a money laundering solution, that'd be different.

Know Your Customer laws are the reason given by AirBnB themselves: https://www.airbnb.ie/help/article/3004

[DennisP]

That refers to simple KYC "such as your legal name, date of birth, or government ID."

OP complained about "your bank account numbers, entire transaction history, financial data, and contact info." Normal KYC does not include all this.