It's because on how Mike really market himself in this fight. There are a lot of videos of hype training very hard and then others saying that he is in the best shape of his life. He could be, but it's the question if he can pull the trigger or not. So definitely at 58 years old, he can't do it any more, he gets tired after the first two rounds and just showing a glimpse of himself throughout the 8 rounds.
You can call it that way, we've been deceived while Jake and Mike going to the bank and cashing it out. And now there are reports that the fight could have been scripted. But regardless, we know that Mike Tyson is not going to win this fight.
It's easy to say that the fight was scripted but difficult for many people to believe without a proof. I could easily guess it's scripted because I felt that with Mike's records and practices he can win but at same time we know that Mike's age was really something not to compare with a young energetic man. They caused a lot of gamblers their money.
See so many videos about showing the fight of Paul and Tyson is scripted.
There's a youtuber showing some good points about this fight here
https://www.youtube.com/watch?v=jvpm3XtclXwBut any of this its expected and the fight is already over so still respect to the legend since despite of his age he show up again to bring good show to his fans. People surely understand the result that's why he still earn their respect even if he lose.