The Maneuver Brigade as Unit of Action

Just had a thought pop into my noodle. In the decision to shift to a brigade based organization versus a division based one- I wonder how much of influence the maneuver training centers had.  NTC at Fort Irwin, CMTC in Hoenfels, JRTC at Ft. Polk, PCMTC south of Fort Carson, and YFC in Washington state. All are sized to provide training to brigade sized elements. In fact, I can’t think of a single site that the Army employs that can routinely accommodate units larger than brigade sized. So if the Army spent the last 20 years of the Cold War doing its major exercises at the brigade level, even when its doctrine was based on the division, is it a surprise that the field grade officers that actually write doctrine were far more used to brigade level operations?