Halving means less revenue, less revenue means tighter budgets or economic loss, making miners shut down, that's what he was saying, and it's a totally normal thing, we even had a nearly 6% drop after the halving and I seriously doubt that the current numbers of growth are true from the 13% at the start we were down to 10, then 7 now:
Most likely a small growth but caused by gear replacement, if the halving wound have happened during a time when there was no higher and more efficient gear available to swap your machines for probably we would have seen a serious drop.