The size of his streaming audience is largely predicated on his perceived skill though. So, he may hypothetically feel pressure to cheat in order to impress his audience.
But they have tutorials, put tons of effort into entertaining content, etc.
Hikaru doesn't.
People watch Hiraku because they want to watch a top 5 player.
Offline, he is #4 is slow chess and #1 in Blitz.
He's not facing strong challenges on Titled Tuesday, and (like all top players) he is so good that there simply aren't enough players and data to make the empirical Elo scale work for assessing his win probabilities.