Sounds like a bullish** “force majeure” excuse, covering for some other unstated problem.
They don’t want to get sued by concert promoters who had their dates cancelled.
Saw millers kickoff concert tour with Joe cocker some years back. Joe completely dominated and Miller sucked so very bad. We left in the middle of it and hit the bathroom on the way out. Everyone in the rest room was complaining about Steve miller.
So, no great loss. I’m quite confident ticket sales were lagging and “climate change” is the excuse to cancel.
Thank you “climate change!”