you don't need that for hdmi , you need that for multi channel sound with older xbox and older hardware.
I never said everyone needed it, but MANY people needed it because at the time that HDMI equipped Xbox arrived that was the only way to get multi-channel digital audio without having to rebuy a brand new receiver.
The breakout box only came included with the elites of the time .
The HDMI audio dongle came out when they released the new Pros with HDMI out and it retailed for $50.
The $30 cable from apple doesn't allow the use ot tos or even composite cables for multi channel sound
Maybe that's why it's not $50.