I think you’re not looking at this from the perspective of breeders, growers and processors who can’t afford a good GC-FID or GC-MS or HLPC.
This work was done to provide an alternative to those instruments. There are many reasons those instruments won’t be a solution for many people. The interest in the Purple Scientific thread is a good example.
For those who can afford those kinds of instruments, know how to use them, or have access to people who do, I totally agree with your position.