I suppose that Anthropic or any of the other companies that develop foundational AI models do this. This would be a vertical integration strategy. However, they would spend less time developing the best foundational models, so they might not want to keep a more focused product vision, and keep their capital focused on build better models and improving Claude.

Yes, they will be able to do this, but it's a lot of work, and Lovable has a pretty good head start.