Anthropic's optimization target is getting you to spend tokens, not produce the right answer. It's to produce an answer plausible enough but incomplete enough that you'll continue to spend as many tokens as possible for as long as possible. That's about as close to a slot machine as I can imagine. Slot rewards are designed to keep you interested as long as possible, on the premise that you _might_ get what you want, the jackpot, if you play long enough.
Anthropic's game isn't limited to a single spin either. The small wins (small prompts with well defined answers) are support for the big losses (trying to one shot a whole production grade program).