This is in the same category as correcting people who say “this data.”
Yes, you’re technically correct. But also, you missed the point and are being self-defeatingly pedantic. The economics prize is valued for all the reasons the Nobel prizes are; they carry similar prestige and are thus used interchangeably.
> Not a Nobel Prize
> The prize in economic sciences is not a Nobel Prize.
https://www.nobelprize.org/nomination/economic-sciences/