Based on their homepage, that doesn't seem to be true at all. Claude Code yes, focuses just on programming, but for "Claude" it seems they're marketing as a general "problem solving" tool, not just for coding. https://claude.com/product/overview
OpenAI has been chaotically trying to pivot to more diversified products and revenue sources, and hasn't focused a ton on code/DevEx. This is a huge gap for Anthropic to exploit. But there are still competitors. So they have to provide a better experience, better product. They need to make people want to use them over others.
Famously people hate Google because of their lack of support and impersonality. And OpenAI also seems to be very impersonal; there's no way to track bugs you report in ChatGPT, no tickets, you have no idea if the pain you're feeling is being worked on. Anthropic can easily make themselves stand out from Gemini and ChatGPT by just being more human.
Use the top models and see what works for you.
Anthropic has claude code, it's a hit product, SWE's love claude models. Watching Anthropic rather than listening to them makes their goals clear.