Indian restaurant spice mix is about speed
Indian homestyle cooking takes a lot of effort. Just look at the wonderful curry recipes all over the internet. Complicated. Many steps. They take a long time. They’re worth it. No doubt. But they’re real work.
Indian restaurants can’t do it the same way. You would be waiting for hours to eat. Restaurant curries take 10 minutes to cook. There’s a few tricks to make that happen. Indian restaurant spice mix is one of those tricks.
They all do it. First they figure out what base flavour profile is right for the restaurant. Then they figure out what’s common. The stuff in pretty much every recipe. That’s Indian restaurant spice mix.
They then use that spice mix as a starting point. And layer flavours on top to create their masterpieces. Pretty clever.