LordRaoh, it is as you implied. You are missing the point of why everyone wants voice chat. There are posters here on this board that could give a better explaniation then I could but it is a feature best experienced rather then questioned if you still don't understand what the purpose of the feature really brings.
I'll try anyway. Say, I have a friend just bought Resident Evil 5 and wants to play Coop with me and has a headset. He/she is stuck and confused how the invite system works because let me tell you, every time I send somebody a invite, they respond to the message and normally I would have to reply to them that you are not suspose to VIA text messaging, you have to highlight the message, press triangle and accept the invite.
The best solution is to send them a chat invite, then boom both of you are talking to each other regardless what acitivity you are doing. It is easier, saves you alot of time, and it does not require you to keep pausing your game to type out a text message. Sometimes when I have to explain something to someone without using the text messaging system, I would have to actually quit my game, send him/her a chat invite that would require him/her to quit their game as well so both of us can explain to each other what we have to do in order to solve a problem.
So as I said, 90% of my conversations with other players is all gaming related. it may not have any benefit to you, but it would make living so much easier for me and the majority of the community that has requested Voice Chat since day 1. For our sake, I hope any naysayers do not affect Sonys decession to NOT to include Voice Chat. As long as Sony listens to the rest of us that want it, I could care less. It will be a daily tool when I log on to PSN to play someone, and I don't have to resort into text messaging all the time.