ELI5: How come female animals can get sterilised (with everything removed) but for women it is not recommended (I even heard organs can start dying due to the lack of hormones produced by uterus and ovaries)?

ELI5: How come female animals can get sterilised (with everything removed) but for women it is not recommended (I even heard organs can start dying due to the lack of hormones produced by uterus and ovaries)?