My definition of the ideal adventure bike would be the smallest bike (in weight and power) that can safely keep up with traffic on the fastest road you plan to travel on. Obviously the answer will be very different if your trip is mostly interstate highways than if it is dirt and quiet back roads
Anyone who has ridden much serious dirt knows that picking up and/or pushing your bike will be part of the routine, and heavy is ALWAYS bad when that happens. Less power can mean far better throttle control when the going gets really rough and nearly always means much better fuel economy for more range.
We argue mainly because our definitions of what constitutes "adventure" are so different.