No middle man, no third party, direct p2p, no fees for winner, more fun, fair play against another player, no kyc, no coins getting frozen, and I can go on and on.
I see what you did there. Most of the things you mentioned are literally one thing just phrased differently

As I said before, it makes sense only in 2 scenarios: if you can't use an online betting site, or if the odds are much better. Otherwise, it's just slower and overall less convenient. For smaller bets tx fees can make it not worth it, for bigger bets you'd want an escrow (which would charge fee) to mitigate the risk of the losing side not paying.
Back to boxing, Mike Tyson is seriously getting involved helping Ngannou and his coach to prepare for fight against Joshua!
The video you posted is no longer available, it looks it was made private. But yeah, having the Iron Mike on his side benefited Francis in his first fight, so keeping the cooperation going is definitely a good call. Despite his age, Tyson still has it, and it must be motivating to have him around during training.