Don't like the image presented of him, but can't say I disagree with the Man of the Year choice.
Electric cars continue to be all the rage and he's still the face of that. Crypto has also been all the rage this year and whenever Elon tweets some bullshit about it, the price change. This new revolutionary concept of how people get paid and how they pay for things has - in 2021 - mainly been influenced by what some shitbird types on a website.
All that, in my view, makes him Man of the Year material, even if he's not my Man of the Year.