It's a business and assuming they allow WiFi access on-premises for customers, it's just a business decision that issues associated with having open WiFi are minor relative to customers who won't frequent your establishment--or a hypothetical for a future date that they'll deal with when the time comes.
Probably increasingly irrelevant with increased use of just mobile phones and 5G anyway.
I reacted to this. Not personal open wifi. In cafes the password is often on the wall, in the menu or otherwise easily obtained.