OK, so you want to take an inflation measure that isn’t perfect and reduce it to an inflation measure that’s useless because it bounces up or down 20% every month.
Thanks for your opinion.
They could smooth it. This isn’t rocket science. Pick a moving average - simple or exponentially smoothed, bridge at least three futures expiry dates and start there. It would result in a better reflection of the input costs to the economy and factor out the exogenous price spikes and dips due to futures speculators.
Just sticking our heads into a hole, which is what is being done now, is far more useless and is being partly reflected in the decline of the USD.