"Addressing the Quality Change Issue in the ConsumerPrice Index" by US BLS (1997):
* https://www.brookings.edu/bpea-articles/addressing-the-quali...
"On quality bias and inflation targets" in Journal of Monetary Economics (2014):
* http://www.columbia.edu/~mu2166/quality_bias/quality_bias.pd...
I'm sure all these peer-reviewed folks are wrong about calculating the CPI and measuring inflation, and you're right. That the academic researchers, pension funds, futures traders, bond traders, union negotiators… all those folks missed this. But you… you've blown the whole thing right open.
The other possibility is that perhaps the professionals know what they're measuring and the pros-and-cons of various metrics.