I disagree so strongly. At some point in my life, I had distorted my thought process heavily by fast chess. I in particular played it like Tal would. The element of surprise plays a major factor.
I was never as good as you in chess. My best game ever with normal time constraints was a tie against a 2400, and my regular games are around 2000. But it was only a hobby.
What is troubling about chess in general is that it cannot be truly learnt. As computers have shown. With that in mind, let's also assume that intution plays a role. The classical offers the second best way of determining who has got it right. Fast chess kills your intuition as it offers incentives to play the more wrong game that your opponent might blunder to. When I play normal chess, I play in a way that is safe up to somewhere between 5 to 7 moves depth, at my best days. Magnus has more depth obviously. So if his opponents play for the win, they will lose. And under time control, he has a better full view of the board, so plays faster and that's all as much I can tell. But if his opponent has an different, perhaps intuitive, style, which I have no understanding of, he will lose. The key point being, that the move that is the best up to depth 7, can be the move that you could see how it loses you the game if you had more depth.
To my main concern about your comment, playing fast, particular bullet and blitz, indeed damages your right intuition if there is any. And if the person is anything like me, it might bleed into other aspects of their life, with consequences.
My advice to anyone who plays fast games and has a sharp and computing mind, is to spend time at a creative activity, such as writing, some sciences, and put chess aside for a year. Develop your creative skills, and then you'll notice the negative impact of bullet and blitz (With all due respect to your skills, the terms bullet and blitz makes me feel a turmoil now), which I consider to be quite serious.