Would you care to tell us
the turning radius of your boat at that speed, or how how well you can
control it if you release the throttle?

As with all jet BOATS (PWC or otherwise)... when you completely let off of
the throttle you lose the majority of your steering capability. Not all..
but most. That's why PWC riders match their throttle position to their
speed, to maintain steering capability. Of course, the PWC manufacturers
realized that this was a shortcoming and invented things like OPAS
(Off-Power Steering Assist).

Sailboats on the other hand... well that's a sad story. When they become
becalmed or lose sail they lose all navigational abilities (short of firing
up their engines.. if they have them). They're nothing more than floating
buoys at the whim and will of the currents. And that's why, on a sadly
regular basis, they block navigation channels, run into piers and moorings,
and go aground. And that's also why I spend a substantial portion of my
boating season tugging these poor guys around the lake.... with my lowly
PWC.

After all... we're all BOATERS... and it's the right thing to do.