Why is Visual Builder Studio not as free as Apex?

The Apex design with Redwood and AI seems to have greater potential in both design and performance than Visual Builder Studio (VBS). Is this true, or does it seem that way because VBS – with Redwood for modules like Sales – only specifies unique and standard objects for those modules?

When you use VBS to extend Oracle Fusion, VBS is free. There's no charge to use VBS to implement or extend Sales, Fusion Service, or other Fusion applications.

There's a sister product on the platform-as-a-service price list called Visual Builder Cloud Service (or sometimes just Visual Builder), which can be used to create bespoke applications unrelated to extending your Fusion license.