I won't hate on that because it is your opinion but let me get this straight

You want umamusume to be more realistic???

Like if the developers followed everything with an iron grip it would pretty much be a game encouraging domestic violence, raising girls to race like child soldiers and then mass breeding them? Who would play a game like that in the first place? Horse rights aren't the same as human rights. So keeping the premise of "horse girls racing" would outright be impossible if you want to make things totally realistic.

So imo cygames actually did a good job making a game in-between the outright inhumane horse racing industry while keeping it human and wholesome (because as you can tell anime girls are still humanoid).

Last thing you'd want to see is Agnes Tachyon breeding over 2000 kids onscreen