At one time, somebody had to build databases, not a problem anymore, now we just use Postgres, MySQL, MongoDB, etc. etc.
We used to write CSS from scratch, now we use Bootstrap.
Think of how many gems or packages your average Rails and Node.js (sorry, don't know much about Java, C#, etc. etc) apps use. That's all these pieces glued together. How much 'code' do any of us write anymore? I'd say very little, and it seems to be less and less every year.
They did create the value - of the new entity that is the glued together product, which did not previously exist. Most of the time creativity is combining two or more existing things to get a new whole. The unique creation is an extraordinarily rare event.
It's very likely those components that the company glued together, were previously individually glued together from prior ideas / inspirations and existing concepts or products.
You'll find that most of the businesses in this world are little more than glued together pieces, rearranged combinations of previously existing elements; often done better, or in a slightly novel way, or with better customer service, or more efficiently, and so on.