I am not sure why you feel offended by my statement. People on here are able to read, believe it or not. Just because someone questions something it doesn't mean that they are automatically unable to comprehend. Conversation is a two way street, you know?
There are many humans that appeared here on this forum who can prove that your statement is only partially true. As every Body is built different, the limitations are also different for each and everyone. There are people with prolapses so long that they can nearly touch their knees and they have no trouble with it.
Others will develop problems. It could occur from bad genetics, general health issues or sometimes also irresponsible sexual activity. Yet you cannot generalize things. Same with "permagapes"...in the end it's just a stupid term that porn came up with for girls who are able to relax their butthole so easily that it looks like its always open when they're in doggystyle. But that doesn't automatically mean that their anus is destroyed. Some even are able to do it without even being into anal sex. It's called muscle control and some can just relax their butt like that. That combined with being on all fours,head down, so the air flows in leads to a "gape". No need for "serious injury" being involved.
Nevertheless in regards to the pic you posted:
Yes, it looks very unusual and not aesthetically pleasing. Still i don't think, that it's actually the upper intestines involved or anything. He's just had bad luck how his prolapse developed. Some people get a big bulge like that. Look at dirty garden girl or even kitty25 and how her prolapse developed. It's similar. What it could be is that is second ring is still quite thight and basically strangles the rest of the colon, leading to that big bulge. But that is just a theory.