i usualy fiercely dispute the "everyone wuz gays" narrative. but there has always been a subroup in every nation even if they were not openly tolerated.  as the old saying goes "not for every man, is the voyage to korinth". the island was famous for it's aphrodite temple hosting young male prostitutes and not just the usual "priestesses". all that to say, for once i wouldn't be suprised if they were right at least in principle. even if they exaggerate it to appeal to modern sensibilities.
Sweden