Ramarma,
After I watched the following video, I was full of reverence for this grand lady Sangita Kalanidhi Kanyakumari.
https://youtu.be/mRS0vKFF1Cs
If your question is why she has not promoted herself or has not been celebrated as much as the Trinity of the violin etc., my own answer would be
1. Apart from the Trinity in fact there are other really great violinists among men too, unsung.
2. After T. Rukmini she came on the scene but stayed with MLV, Shrinivas/Ravikiran, Kadari etc. Maybe if she had accompanied big name men vocalists, it would have helped her.
2. By nature she seems a shrinking violet.
3. Her "instrumental ensembles" have come a little late to move the needle, given the total dominance by vocalists.
She would perhaps now be quite content being accorded the SK and other honours and then producing time and again great men violinists who carry her stamp.