Sancho Panza wrote:

In view of the experience of the JetBlue flight that had hydraulic
problems on departing Las Vegas for New York and had to fly around Vegas
for hours to consume fuel before landing at McCarran, is it accurate to
say that the Airbus A-320 can't dump fuel and that F.A.A., among other
authorities, has approved the plane despite that?

Why not? The aircraft can land overweight if there is a real emergency.
They just have to be careful about maintaining a low rate of descent when
they land to keep any problems to a minimum. An inspection is required.