Haikyuu blue lock slam dunk ao aoki are like ig only famous sports anime in modern times. If you ask someone to list top 10 rom com or action or mystery or isekai or anything it would be easy for them to tell here for sports out of these 4 if you'll ask has anyone watched other sport there are maximum chances of getting no one may say captain tsubasa well good enough but ig most sports required rapid movements and every clutch moments happens so quickly and like we can understand while why it happened how it happened but to show this or make the user understand is really tough we it get easier for football as it has key moments and big chances like who passed how did someone dribble and all likewise for volleyball too.
But still animating these or making mangas on these are heck of job people with talent do.
That's my reasoning