That's not necessarily true. There are many companies that have both end user products and B2 products they sell. There are a million specific use cases that OpenAI won't build specific products for.
Think Amazon that has both AWS and the retail business. There's a lot of value in providing both.
There is no real future in AI long term.
Its use caustically destroys more than it creates. It is worthy successor of Pandora's box.
There exists no future where OpenAI both sells models through API and has its own consumer product. They will have to pick one of these things to bet the company on.