I don't think we're disagreeing at all, just looking at the question of position/control from a slightly different angle. Basically there are four things you can reasonably do from a position of control:
- Try to finish the fight,
- Try to maintain control (and hopefully use your weight to gas your opponent),
- Try to change to a position where it's either easier to finish the fight or easier to maintain control,
- Give up control for some other advantage.
Excepting back control, there's generally a significant trade-off between how easy it is to finish from a position of control and how easy it is to maintain control and gas your opponent in that position. A dominant position that a fighter isn't trying to get a finish from is an escape waiting to happen. Positional control is a secondary scoring factor, but it's still a factor, so moving from a more-to-less dominant position to make it easier to maintain control makes sense when a fighter isn't looking for a finish. Of course, mostly fighters should be looking for a finish and making use of those dominant positions.
It was weird seeing Khamzat on top, in the crucifix throwing nothing but repeated short arm punches to the side of DDP's head when his head was safely tucked and the punches had no chance of doing any non-trivial damage. Why didn't he throw elbows, hunt for a kimura, or retreat to a position where a little sweat on the arms and some hip action from DDP wouldn't lose control? Because DDP wasn't trying to escape at all, which was even more weird.