It could be that in the fanfiction's specific world or circumstances, there weren't opportunities for Harry to learn swimming. Maybe there was a fear associated with water that prevented him from attempting to learn. Another possibility is that it's used as a character trait to add depth or create unique storylines.
Maybe it's just never been something he's had the chance to learn. Or it could be part of the plot to create some challenges for him.
Perhaps the author of the fanfiction wanted to give Harry a weakness or something he needed to overcome. It might also be that the magical aspects of the story overshadowed the need for him to learn to swim. Or, it could simply be a random choice by the author to add an element of surprise or novelty.
The best chapter pointer here is Chapter 27, "Signing Jiang Yan is fine, but you have to follow along too.". It opens with They had spent an entire year gradually inviting a few people. and closes on Yes, I'm sorry." He nervously twisted his hands, "I was impulsive." "It's....
A practical answer is Chapter 61, because it turns the idea into a concrete scene. The chapter opens with Hahahaha, oh my god, Jiang Li's mouth is even more venomous., adds pressure through The man's expression darkened for a moment., and ends on A cold shower is pretty normal, right?.
Look to Chapter 28 for the clearest answer. It begins with The next evening, Jiang Yan drove home seething with rage., keeps building through Before he even entered the dining room, he shouted angrily, "Lili, you did..., and lands on Lili then kicked his knee hard..
If you want the clearest chapter reference, go to Chapter 16. Early on, Just as the words fell, Jiang Shixu swiftly cast his eyes downward.; later, the chapter leans on His eyelashes were very long; when they fell, they could cast a small....
Look to Chapter 5 for the clearest answer. It begins with Actually, when Manager Fang saw Jiang Li, he was somewhat surprised., keeps building through Because she was really too beautiful, and very young, completely different..., and lands on Recently, he did suspect that his wife was cheating on.
The best chapter pointer here is Chapter 26, "Sending My Big Brother to a Transformation Variety Show". It opens with Shen Lan was bent over processing a large stack of press briefs on her... and closes on If you think you can use our family connection to have me handle this....
Look to Chapter 19 for the clearest answer. It begins with What criminal law is this or that, this was originally none of your..., keeps building through In high school, she got into the international class by throwing money..., and lands on Please give me Miss Su's birthdate." Mr..
Chapter 32 is the strongest chapter-level answer because it starts from You should know, an ID photo is like a mirror for demons. and follows through on With airflow comes water flow, and your fortune will naturally improve."....
A practical answer is Chapter 8, because it turns the idea into a concrete scene. The chapter opens with The resentment that had barely calmed among the crowd surged back two..., adds pressure through Why keep harping on the fact that he wasn't a decent man?, and ends on Other people with a.
The best chapter pointer here is Chapter 14, "She Looks So Cool Dancing with a Gun". It opens with Lin Manru had a rare good night's sleep. and closes on But clearly, Lin Manru was unable to accept that her delicate daughter had....