Building on the summit

Traditional Permaculture rules would suggest building 2/3 down slope, however with super insulated straw bales (and even JUMBO bales!), combined with double glazing, is there any practical reason why one cannot build on the summit? We have excellent views, and it would be a shame to forego them unless necessary.

Looking forward to your thoughts!

Not sure what a "super insulated bale" is exactly but I would think it will be much more efficient 2/3's down the hill.
You don't have to give up the view, just maybe forego it from your homestead. Perhaps construct something else at the summit, something that functions naturally at that location.
Even just a viewpoint, sitting area initially until you observe & figure out a better plan for the spot.

It would be nice to build just below the summit, to do a walkout basement and have similar views. Keep in mind you might be hurting other's viewshed. An advantage of building near the top would be easier to control water surface runoff.

The substantial R value of strawbale is likely to make your double pane windows the weakest link by far in your wall performance. Most importantly, especially as you get more exposed to wind, is to make your you build as air-tight as possible. High R value can be rendered useless by uncontrolled airflow.