Cause it's their nature. They are born to get pregnant.
But still in some manga omega are outstanding as they pay more effort than others. They can still be intelligent if they are hard working! :)
Lol, how did them being able to birth children have to do with intelligence?
lololol
that was harsh karma xD
no i think what karma meant was more like - they are ONLY born to get pregnant and give birth - nothing more xD like - they don t need to be smart for that xD
well at least i hope that s what karma meant xD hahahaha
why must the stupid one always be the omega