But it's just spent 30-45 minutes at boiling point. If you keep the cooker closed and only use clean utensils to remove rice I'd say the risk is pretty low.
My understanding is the Bacillus cereus spores aren't guaranteed to be entirely killed off in typical rice cooking times (also, 30-45 minutes boiling seems long for cooking even 4 cups of rice in my rice cooker). If not killed, the remaining spores become a problem.
The contamination (spores) come in the rice you buy.
The contamination (spores) come in the rice you buy.