They also wanted to focus more on friendships as well... so not every relationship you establish has to be about romance and bed-mating. They cite Garrus from Mass Effect 3, saying that some moments were just about establishing a friendly bond and they do want that sort of element to be present with some of the characters in Mass Effect: Andromeda. This way you don't have to worry about always saying nice things and then eventually you choose one last nice thing to say and mistakenly end up having inter-species relations with someone you only wanted to be friends with.