I've never met an artist who was not interested in other media. That astonishes me!
You need to spend some time in front of some Goya's or some Van Goghs or Munch's or Soutine's.
Your point is a good one. Experience in/knowledge of various mediums only enhances your overall studio practice. Art history and other artists' work (as you point out) are integral to being well rounded...whether you're abstract or realistic. As with anything else, we ultimately focus on those things we are particularly drawn to, but I have found only good coming from expanding my knowledge/experience base.