The entire premise of modern CSPRNGs is that you feed into them whatever entropy sources you have, wherever it's from, the more the better.
The point of disagreement here, about whether or not it's possible that they'd be choosing to use the lava lamps to the exclusion of some better source, doesn't make any sense against that framing.
The point of disagreement here, about whether or not it's possible that they'd be choosing to use the lava lamps to the exclusion of some better source, doesn't make any sense against that framing.