Why did Vancouver become a large metropolitan area?

I don't exactly got the exact answer but this provides details.

Owing to its proximity to Asia, as well as its excellent deep-water harbour and transportation infrastructure, Vancouver is Canada's primary hub for trade with Asia. The city's international connections have also made it an important financial centre.

the roman republic began to expand when rome fought the punic wars and defeated carthage. the punic wars refer to the series of 3 wars fought among rome and carthage, before it ended in carthage's defeat.