I see you made this comment several times here, so let me try and explain...
Sometimes the office pays for group lunch, if you want something else, feel free to go, but prepare to pay for it yourself (This is rarely the reason to stick with a lunch group you don't enjoy).
When a group decides to go out to lunch, it's not because they all want to eat the same thing, it's because they enjoy it or recognize that it's good for office morale. Picking where to eat is a small inconvenience in this regard.
Most of the time, the problem is not too many choices, it's indecision. Everyone is hungry, they all want to eat something Good, but if you ask them what you want, they can't decide. If you put a CHOICE, most people will say eh, there must be something better. But almost everyone is content or doesn't really care what to eat if there's a solid decision in place. That's why these apps take the decision making out.