Your logic being that Claude-as-code-gen competes with a putative future Code Interpreter-like product on Anthropic?
That seems like a wild over-reading of the term. You're prevented from 'develop[ing] a product or service'. Using Claude to generate code without or without sandboxed execution is not developing a product or service.
If you're offering ab execution sandbox layer over Claude to improve code gen, and selling that as a product or service, and they launch an Anthropic Code Interpreter ... then you might have an issue? But "you can't undercut our services while building on top of our services" isn't a surprising term to find a SaaS ToS...