Well,well, seems you mix up everything:
Unfortunately, the damn hybrid is named Sunlight Sky Roths. Except that they registered it, Sunlight Nursery has nothing to do with the scam the nurseries are doing with this hybrid...
https://www.facebook.com/sunlight.orchid.nursery
If you look, they have roths with a dorsal of 6, etc... and those are rothschildianum. They were not the only ones to have made Sunlight Sky Roths as well, at least 3 nurseries made their own... They were the first ones to register it, however.
That's the flock of other nurseries who got Sunlight Sky Roths, and sell them as rothschildianum. It is not a matter of 'belief', but the worst is that at least 2 idiots on Facebook posted their roth with a dorsal of 8+cm in front of many Sunlight Sky Roths, where 7-8 cm is a kind of norm. So nothing about believe,those are just facts.
For the scheme, as a very famous Paphiopedilum supplier told me once, it does not matter what is sold, because most hobbyists won't bloom them... It gives the general vibes about the commercial side of the plants.
As several extremely famous ones, including Japanese, are doing too, they come to Holland and load pot plant Complex paphs to sell them with a pedigree... or to a large wholesale nursery ( again not involved with what their customers are doing...) in Germany, buy generic paphs, and put a pedigree/photos of the parents on it. It is a significant part of the Paph business. I have seen it many times, and have been a witness to it in a few instances.
That's why I know too that many of the largest esquirolei awarded are in fact Hans Strahl. The people who got several FCC ( and a GM/WOC in Dijon) visited Wichmann couple days before, bought Hans Strahl, and the same plant/same flower reappears as a top quality esquirolei... SOme ordered as well in a shipment, some bought from another nursery in Germany as 'giant esquirolei'. There are F2 now sold as esquiroei in Japan too, with weird dorsals and petals, typical of the hybrid.
For the primulinum and the honesty of the Indonesian parts, well it is simple. 'wild' Paph superbiens show a plain callosum dorsals in some of them. Selfing of them, again, show a callosum dorsal. Agusii x self gives some urbanianum, nearly straight. If I had not been told that agusii was a 'species', and just show photos, I would have said it is an urbanianum hybrid. Some of the 'wild plants cannot be distinguished from urbanianum as well.I can post photos of these.
In the wild you woud be surprised as to what can survive, including hybrids... There are sometimes colonies with a few dozens Glanzeanum that are found in North Vietnam ( micranthum x emersonii), and sold. It is not rare to see in gratrixianum colonies hybrids with helenae, and hybrids with villosum, etc... Pollinators are not as species specific as some would like, after all. roth x dayanum, dayanum x volonteanum, virens x volonteanum exists, and are regularly offered as wild plants... In non orchids, there are hybrids colonies of Nepenther edwardsiana, that propagates and give Fx offsprings...
For primulinum x glaucophyllum, easy. The 'real' primulinum is hardto grow and quite slow. The hybrids multiplies at light speed, even in nurseries in Kunming, they set seeds and you get young plants all over the place... There is no 'variation' as well that will make those plants have glaucophyllum style leaves for some of them... Otherwise we need to accept that Paph White Knight is in fact a pure niveum, because the flowers are white and round...