I think this is a great option. I don't think this option is problematic just because it is not a different option that has not been added to the game, yet. I had no plans to immediately play a baby, but now I just might.
Unlike a lot of other people, none of my game is on hold waiting for this new pack to come out. I am happily doing my own thing with what I already have. I'm more worried about my current play being disrupted than I am excited about what is coming. Science baby needs less prep from me. Prep that I am not interested in playing just to try out the new gameplay. I am one of the players that has bought almost everything but just might now buy this pack at all, unless there is build/buy and cas that I want.
Complete surrogacy and complete IVF options and all the personal and emotional play involved in that is something that I would like to see available for the people that want to play that. I think this is an attempt to lure some players like me into creating a baby. Babies are not my favorite thing in real life. It is not shocking that I would be in no rush to add one to my escapist pastime. I am slightly curious, but I need something instant and easy if I am going to bother satisfying this mild curiosity for this new thing.
Someone mentioned a baby in a baby carrier on the back of a vampire. That is the type of play that I might try. I need to get the baby on the back of the vampire pretty quickly or I will lose interest immediately. I'd rather spend 3 days trying to harvest a wild plant than growing a baby. I am not trying to dismiss the heartbreak of infertility or the discrimination that some families face when trying to add children to their lives!!!! That is another type of baby option than strapping a baby onto the back of a vampire or robot.