That's his point. A hardware TRNG's bit stream (plus bias filtering, if necessary) could be wired to flip-flop gates (shift registers) to output lottery number

That's his point. A hardware TRNG's bit stream (plus bias filtering, if necessary) could be wired to flip-flop gates (shift registers) to output lottery numbers, with a component count in the low hundreds at most, no software to compromise, and off-the-shelf, mostly passive commodity components. In short, readily auditable, easily recreated. You could build the system out of parts ordered from multiple manufacturers/OEMs in front of multiple auditors, seal it in place, and never touch it again. You could inspect (destructively and non-destructively) the components directly to verify their implementation. However, we live in a world where the TSA pays hundreds of thousands of dollars for an application that flips a coin, so the fact that state lotteries are using complete operating systems on a standard PC should be unsurprising.