Zoox co-founder and CTO Jesse Levinson believes Tesla does not have the technology for a reliable self-driving system.Levinson highlights the need for more hardware than Tesla currently uses in its vehicles for building a safer robotaxi.He finds Tesla's Full Self-Driving software impressive but also stressful, as it occasionally makes mistakes.Meanwhile, Zoox is preparing to launch its custom-built robotaxi in San Francisco and Las Vegas markets.