LE Audio is built around a channel concept, where a channel is unidirectional and a connection can have multiple, e.g. listening on 2 stereo channels and when a call arrives enabling 2 mic channels in the other direction for stereo microphones
Don't go around throwing shade at the spec authority if you haven't read the spec
You may remember the switch from bluetooth connections being something you had to manually enable every time you wanted it, to devices just being connected all the time (without causing your battery to drop). That’s what LE enabled.
The switch to the single packet network approach obviously also simplified everything else you might want to transmit.
The audio specs are still from the pre-LE era with different modes for everything you might do (modem, fax, headset, headphones, HID, etc), and LE Audio introduces a new and clean way for that.