Re: Sims 4

It most probably has to do with the amount of animations they need to do if they are not the same height. They would need to program every animation for teens too so it was one of the cuts they made.

It was a lot of trade-offs. You have to decide if you can live with that or not. 

There's no devs here that will answer you this question. We're just users like you. You can try if a SimGuru answers you on twitter.