probs cause tit sizes in manhwas/mangas are outrageously large, consistently. you see a lot more hugely-breasted girls with a waistline of like 12 inches than a hugely-sized dick on a guy. BLs/yaoi is still somewhat of a niche group id say, in comparison to shounen, shoujo, josei, etc., which are rampant with big-titted women where the only thing "large" about them is their tits or ass or tits and ass. (this isn't a diss on thinner women having large tits btw, cause yeah ik that's possible, but more often than not, tit size correlates with your fat concentration. not always but often.)
That's yaoi for you, they are fujo-danshi so they will really get mad at SL that only has porn in it.
they actually attacked the FL because they know that there boobs IRL are not similar to the size in Sl stories and more reason to get mad is because straight boys who read that manhwa like this kind of boobs, but no girl (or only some) is interested to have silicon. (My opinion only)
In short: The perception of BL fans (more on fujoshi side)
Yaoi is look as fantasy
SL should be look IRL
Lastly, they hated this kind of straight smut manhwa: https://www.mangago.zone/read-manga/iljinnyeo_tutoring/
because it is so unrealistic and the author only use this manhwa to keep the lustful desire of boys being quench from through this kind of manhwa (banging different woman with hot and big boobs)
Some of y’all need an ass whipping bc y’all r getting ridiculous. So tell me why when I was reading this hentai/romance webtoon everyone was attacking the main lead for having way too big boobs?? But no y’all normalize having big dicks in yaoi? Like seriously y’all attack the gurl for having big boobs but when it come for a guy in yaoi having a big dick y’all say nothing? Y’all r messed up. Smh (btw this is no attack for yaoi characters)