The amount of energy needed to refute bullshit is an order of magnitude bigger than to produce it.
a/k/a Brandolino's Law.
https://statmodeling.stat.columbia.edu/2019/01/28/bullshit-a...
The claim is bullshit. We know it's bullshit. Refuting it ties up resources and conversations.
Flag it as bullshit and move on.
See also burden of proof fallacy:
https://www.logicallyfallacious.com/tools/lp/Bo/LogicalFalla...