I don't think hardware random number generators are bullshit, but it's easy to overstate their importance. Outside of cryptography, there aren't a whole lot of cases that truly require that much care in how random numbers are generated. For the kind of examples the article opens with (web page A/B testing, clinical trials, etc.) you'll never have sample sizes large enough to justify worrying about the difference between a half-decent PRNG and a "true" random number generator.