A lot of those spinners developed their art in the days when pitches were left uncovered overnight, which immediately gave the spinners a huge advantage.I accept your point, but if a spinner is to develop their craft, then learning how to outdo.batsmen on such pitches will be beneficial.as we have seen with the great masters of spin in the past - Emburey, Edmonds, Titmus!!! OK, Underwood, Laker, Mushtaq, Lyon, Murali, Warne, and Swann!!
By the way, you left Richie Benaud out of your list.