Steiner's esteem for natural scientific training
That Steiner regarded natural scientific training as valuable is evident from the following quote:
"The main point is that spiritual science, with its methods of research, only begins where modern natural science leaves off. Humanity is indebted to the view of the world adopted by natural science for which I would call a logic which educates itself by the facts of nature. An important method of training has been introduced, amongst those who have concerned themselves with natural science, with regard to the inner application of thinking."
Rudolf Steiner. "Approaches to Anthroposophy." Sussex: Rudolf Steiner Press, 1992. Page 11. Translated by Simon Blaxland-de Lange.