this scandal got everyone talking about karina and boosted her relevance among the kpop fans and even beyond. This brought a lot of attention to her and and after she dropped that apology letter, she racked up massive amounts of pity points by basically doing nothing. Sure karina might have lost some hardcore delulu stans but in exchange she ended a gaining much more in terms of support from gp and non fans.
Dropping that apology letter was actually a smart move, it not only brought lots of free pity points but also might have convinced some of those malding fans and fanbases who were going to stop supporting karina/aespa to think that their parasocial waifu is actually sorry so they might forgive her and continue supporting her. It was a win win move basically.