Vergil's intention in talking about the delegates present was simply to push Lucas to develop his network.
When he was sent over to the Seven Stars Springs Dealership, it was with the instruction to improve on himself. From a very young age, Vergil had been taught not just about vestige-smithing but also how to run a business. Turning 18, it was about time for him to enter the field and the Seven Stars Springs Dealership was the best option at the time.
Vergil gave himself the goal of performing above the expectations of both his father and the other family members. This was why he was obsessed with having Lucas expand his contacts. The more influential people Lucas knew, the more people could be invited into the business and help its growth. It was practically a win-win situation and how the world worked.
The support of the Mertens family alone couldn't guarantee the success of the company outside of Baylands City, much less beyond the borders of the city-state.
