Pure html/css can't do everything javascript can. You can't have it both ways.

Of couse it can't, that is the whole point.

The web should be HTML/CSS for hyperlinked documents only, for everything else native apps.

Where should that be enforced? Browsers? Web servers? Firewalls? If you believe the answer is browsers, you can make that change today. Obviously, others don't agree with you. Why should their web experience be limited by your unsupported point of view? You haven't really made a great case.