It's a bit like when you're playing a video game for so long you get bored of it and start doing crazy things to keep the interest going. Take for example the GTA games. After a while you don't care anymore and start trying to do backflips on motorbikes.
That's one of the strangest analogies I think I've ever read!
Like tbh says, the guy is a fighter at the very top of his profession - I can't imagine he act's like he does because he's bored!
He isn't Superman, he got clipped and Weidman put him away very well - it happens to 99.9% of competitors in virtually every sport!
To say he "chose" to lose, without him coming out and saying it, is ludicrous! (and very insulting to Weidman!)