Jokes aside, I built the GPT to play in voice mode, it's useful to have shortcut when you just want chat GPT to read things out loud, or hear your ideas back to you, with a different voice can help you analyse the way you speak without the distraction of hearing your own voice.
Basically it's a shortcut for a free and quick speech to speech or text to speech.
I honestly was looking to build the simplest GPT ever posible to get started.
Maybe the simplicity inspires other people.