As the author states, you could mix in similar values present in BeiDou/Galileo/GLOSNASS systems, meaning the EU, China, Russia, and the US would all need to conspire to do this.
In case of open distributed systems just one bad actor can delay his message and modify it as needed to get desired results.
Author even stated similar scenario:
For instance, the miner who constructs the block can influence the randomness by choosing to not publish the block if the blockhash is disadvantageous.
Author even stated similar scenario:
For instance, the miner who constructs the block can influence the randomness by choosing to not publish the block if the blockhash is disadvantageous.