What is the problem with using a pre$-$shared key $($PSK$)$ to authenticate users on a WiFi network?

Having one password makes it hard for businesses trying to sell access to the internet

The PSK only checks to see if the user knows the password and does not check if the user should be on the network or if the user is who they say they are

There is plenty of cracking software that can decode a WiFi password and allow someone on

One user can simply tell another user the password to the WiFi