I didn't imply a yes/no; based on TFA, I assume that they used a 5-point scale, with the middle option being phrased something like "somewhat valuable", and there being two more positive ones. TFA is critically lacking in both the survey details and what other features got on similar surveys.
This is the point. There's not enough information to make any kind of claims by subtracting available numbers from 100 and concluding anything with the remainder.
