i mean, youre right, but i dont think thats the point of the manhwa (sorry if you already can tell and im just repeating this stuff but ill continue anyway) its just that culturally speaking a lot places shame women for dating younger men (i dont mean big age gaps, just like, at most 5 years) and for younger men its sometimes unappealing to date an older women. And in places like asia (the whole continent) people care about public opinion a LOT, and it can be really damaging to relationships that are otherwise healthy and unproblematic. İts basically just just because a woman happened to fall in love with a guy a little younger than her shouldnt give her a bad image, ig.
Ok so i believe age matters and doesn't matter at the same time but it surely depends on how a age gap couple treat eachother so my final asnwer is in the middle its a yes and no answer but difference doesn't matter if nobody's the same.
Ps: depends if you're doing something evil byeee!(〜￣△￣)〜