Where as the red led do hit the secondary spike this can still be achieved with the warm white LED, with the addition with hitting the primary spike. You will lose all of the blue spectrum in every red diode used.
As far as when people were using all blue and white..... The unnatural unpleasant look was caused by using a mix of 450nm and cool white LED alone. We have learned a lot since then and that's why more often than not cool white will be the minority in the mix. Using a wide range of purple and blue (400nm-460nm) along with a mix of warm, neutral, and cool white have remedied this problem without using red and green specifically.



