@miyako19 If he did not met the other people, eventually he might just give up on socializing in real life and slowly lose the ability to, the only way left he can communicate with other people would be on Shogi board. He might not realize his love or will for Shogi, but it is his only world to...
Felt like Rei would actually become like Souya Meijin if he had not met Hina, families and friends, he was in a similar trance daze state.
Other professionals have something else in real life that keep them motivated and replenished to get back and keep fighting in the abyss. Except for Souya...
It is not safe to eat consume sashimi of rockfish that is not been treated with freezing, there are parasites. You can do this with some fishes like tuna but fishes caught in fresh water or near shore are NG.