Interpreting "fresh" as "raw" is an interpretation,
Interpreting 'not fresh' as 'rotten' is also an interpretation -- and a big leap, considering the unmistakeable smell and health risks rotten fish poses.
not what "fresh" means. Your tertiary source paraphrases the actual quote above into "raw" but that is not the primary source quotation.
There is no actual quote. This is what the Oberlin source says:
The sushi is anything but authentic for Tomoyo Joshi, a College junior from Japan, who said that the undercooked rice and lack of fresh fish is disrespectful.
Are contending that the student was complaining about rotten fish? I think you've misinterpreted the meaning of 'fresh'. Things can be not fresh (e.g. frozen, canned, etc) without being 'rotten'.
Japanese culture does include some cooked seafood sometimes as part of sushi, such as the examples I already gave: tempura and grilled eel can be included inside sushi rolls. You could also get some crispy salmon skin. So interpreting "fresh" as "raw" is inconsistent with reality. Also, both comments are about incompetent preparation of food, not preferences.
No, it's not 'inconsistent with reality' but rather it is the natural reading of the text.
But even sushi with undercooked rice and 'not fresh' fish is not 'disrespectful' to Japanese culture. It's just incompetently made food.