Tow Pilot Rand/Question

This is prompted by someone's description of a flight involving high sink
from tow release to landing. The pilot stated that he released from tow in
800 fpm sink at 3,000' AGL.

It's so common when I'm towing to have the glider pilot tell me, "I'll take
a tow to 3,000 feet." Then, during the tow, I hit super lift and the pilot
will hang on to the rope. He'll hang on until I'm struggling through sink
and hit the magic 3,000' and release!

I shouldn't complain since the higher tow means more income for the
operation, but I'd think pilot judgment would include releasing in lift -
even if it's below some preconceived release altitude.

Now, the instructors will say, "We need the altitude to accomplish the
objectives of the flight." I ask, "Wouldn't it better to demonstrate
judgment by releasing in strong lift and climbing to altitude to practice
maueuvers?"

Rant over...