Why should an exercise physiologist learn to do data analysis?

I can write software that would be good for somebody doing astronomy, says Gentleman, but it’s a lot better if someone doing astronomy writes software for other people doing astronomy. (emphasis added, substitute astronomy with exercise physiology)

Robert Gentlemen, statistician and one of the developers of R

As quoted in:
Programming tools: Adventures with R
http://www.nature.com/news/programming-tools-adventures-with-r-1.16609