I guess if White really can't castle, it makes some sense to try to play Kf2, but it's hard to imagine this working. Radjabov did not hesitate with the punishment.
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. e2e3  4... e8g8  5. f1d3  5... d7d5  6. c4d5  6... e6d5  7. a2a3 This variation has become a very hot trend as of late, and I have no idea why. Vidit has lost this position three times with the black pieces, but he always seemed better out of the opening in all three games $1 In more recent times, it seems like the variation is one you choose when you want to lose with White to a lower-rated player, and badly—the So-Sevian game comes to mind as well. According to my understanding of chess, it cannot be right to go for a Carlsbad structure with the c1-bishop looked inside the pawn chain. 7... b4d6  8. d1c2  8... b8a6 This move has already been tried by Oparin in 2022, and he is generally very well prepared. It looks a bit weird to me and I certainly don't think it is the only way to a comfortable position, but Black should be fine. 9. g1e2  9... c7c5  10. d3a6  10... b7a6  11. d4c5  11... d6c5  12. b2b4  12... c5d6  13. c1b2 Ding's reluctance to castle into an attack is understandable, but his king will not be any safer in the center. 13... a6a5  14. b4b5 This feels way too ambitious. 14... a7a6 Now it truly is too late. White never got another decent moment to castle. 15. h2h3  15... c8d7  16. b5a6  16... a8a6  17. a1d1  17... a6b6  18. d1d2 I'm not sure what this move was all about—I guess maybe Ding wanted to castle and then be able to move the c3-knight after …Qc8. But it feels way too slow. Still, there were already no good moves $1 It's hard to play an open position with your king in the center and your rook out of play. 18... d8c8 Apparently …Qb8 was even stronger, but who cares. White cannot castle, ever, and Black should win routinely.