> If it was actually about "price discrimination" they would do something to stop you from tuning them back to the full horsepower…

No, not necessarily. Plenty of price discrimination is the exact same thing sold to different crowds at different prices, like pink razors or "dude wipes".

https://en.wikipedia.org/wiki/Pink_tax / https://en.wikipedia.org/wiki/Dude_Wipes

Or how Teslas let you pay for more range in an existing car, with no physical difference, just some code. https://www.nytimes.com/2017/10/27/business/teslas-pricing-h...