Ron Natalie wrote:

Who the hell said anything about right of way here. Both aircraft have
a duty to see and avoid. The category preference only applies to
aircraft converging from other than head on (apply directly to the
forehead). I'm sure the NTSB will give study as to what the actual
tracks were and what the visual vantages were from both ships.

Having watched gliders from the ground and air, I've noticed that from
directly in front or behind, they nearly disappear because of the very
narrow wings and fuselage. If a jet is heading nearly head-on, I
imagine it will be nearly impossible to spot the glider until a
collision is all but avoidable, and that's if you know it's there. The
jet itself would only be somewhat more visible head-on.

I haven't been soaring that high, but I imagine this is a good example
of why flight following is a good thing. It isn't perfect, but it
can't hurt.