This is correct in my opinion. The person in the front can stop and start the TM to please where his next cast is going to be and also where is lure presently is. This is a huge advantage under MOST circumstances - the exception is maybe fishing a spot where there are targets at 360 degrees or when fishing open water. Also the front seat can take the most productive casts.
For instance - I may have 5 rods on the deck and switch back and forth a lot - topwater, floating worm, texas rig, spinnerbait etc...The guy running the TM knows what he has in his hand, where his bait is and can run the TM accordingly - not so for the rear deck....you are going where the front takes you whether your worm has hit the bottom or not or whether the front drags your topwater along away from the spot you just cast to.
The guy in the back has a big disadvantage unless the person in the front pays a LOT of attention to the rear deck and that is hard to do successfully when you also run the TM and try to fish.
If I am in the front I try real hard to watch the rear and help them adjust and be overly fair -- but even then probably make mistakes that hurts the rear deck....unavoidable at times.