I would ask is it a good idea to be trained on a tailwheel like Grandpa was or is it ok to only know nosewheeling?
That is easy to answer.
When discussing light training aircraft it is very simple to learn both gear configurations, and there sure are no shortage of both configurations.
The reason this is not done is because the training industry have opted for nose wheel airplanes in the misguided belief tail wheel airplanes are to difficult for the average person to operate.
Grandpa.....