If I try to set up a hotspot in GNOME, I get the following message:
If you have a connection to the Internet other than wireless, you can use it to share your internet connection with others.
Switching on the wireless hotspot will disconnect you from
<network name>.
It is not possible to access the internet through your wireless while the hotspot is active.
What are the technical reasons why I can't set up an Hotspot and be connected to the Internet at the same time?