We need a method. Without the discipline of a method ANY interpretation must be seen as equally valid as any others. It is the sunnah that places boundaries around our interpretation of the Qur'an. Often, Qur'an Only advocates dismiss the importance of language and translation. By any methodology whatsoever this is an absurd position held only by the most uneducated.
Translations are never exact, regardless of language.
Reject the very idea of the sunnah and the gates of interpretation are wide open, shapeless, overly subjective, speculative, thus approaching meaninglessness. At the very least, it admits the worst forms of extremism and breakdown of community. In addition, it must be mentioned that this crop of Qur'an Only advocates have spawned from the ideas of Rashad Khalifa. One of these ideas is that there is a magical mathematical code in the Qur'an based upon the number 19 and its multiples. Its called numerology and clearly shown to be fraudulent.