My understanding is that Gympie have introduced landing fees. And they have a receiver to record all transmissions on the CTAF in order for someone to generate invoices for landing aircraft.
Thus, there will be a record of any transmissions or conversation between the glider and the LSA. Hopefully a report will come out which doesn’t provide a simplistic knee jerk recommendation.
Glider pilots are trained from day one to look before turning. Their biggest mid air risk are fellow gliders of differing performance sharing the same thermal. Thus looking out, truly is second nature for them.
As I stated before both pilots were 80 and 77 respectively, at the risk of being ageist, I suspect that may have very slightly tipped the odds against them. But, still you have to be really unlucky to crash into another aircraft when both are being navigated randomly in 3D. Randomly being the key word.