Pre cooked potatoes being boiled in my local restaurant kitchen.
They start with oil, finely chopped onions, garlic/ginger paste, cassia bark, bay leaves, panch phoran and salt,

They then add tomato paste, turmeric and some mix powder.

Then in with the potatoes and lots of water.

...and not a chip in sight.
Sweeping statements can be misleading.
Cheers
Mick