In real life, attractiveness isn't equal to being good looking. Charm is another holy thing. Voice, mimics, how you speak etc. BUT.. That's not the case for webtoon/manga etc. Uke doesn't look attractive (But I love Never Understand's uke, he is the coolest and cute)
(A lot of chubby people are attractive I know, but not Manga characters, visuals carry all attractiveness here)