In fact, the Avery family's influence over the country and its economy was akin to that of an emperor in ancient times. This immense power made them a prime target for numerous forces seeking to dismantle their dominance. Many aimed to either replace the Averys or at least take a piece of their power to fortify their own positions.
This is why Gerald believed that Hera needed the marriage alliances with the men surrounding her. He had thoroughly investigated their backgrounds to ensure they had no intentions of using Hera, especially since they were still unaware of her true identity. This only reinforced Gerald's belief that their feelings for Hera were genuine.
He was also aware that Hera had a marriage alliance arranged with the Hendrix's sole heir. However, given that the Hendrix's power had weakened due to constant attacks, he believed this alliance alone was insufficient, especially when facing those who controlled half of the economy.