There are three routes to apply: digital nomad, soft power, and dependent. For example, If one spouse is a digital nomad and the other isn’t, they can apply as a dependent of the spouse who is a digital nomad. That being said, they still have to fulfill the other requirements, such as 500k
First, it is a way to confirm you are in the Netherlands and second they want to understand why you need the DTV vs. 6 month tourist visa. They might want you to log into your account and show the money. No need to get stressed. Be honest and all will go well