@shiawase @mario I think it could mean something like:
"You, who were born and raised in the ultimate weapon Tokyo, wouldn't even think of saying this place (Tokyo) isn't special."
Some definitions of 発想:
新しいものごとを考え出すこと; 思いつき; as in "to think of (sth./doing)", "to get the idea")
And 言葉にする can mean 口に出す or 言う, as in "to say (out loud)".
Some people tend to idealize their birthplace, and while they might know deep down that it's actually not a special place, they would never say (admit) it.