You can point your toes in ice dance/synchro boots, cause the ankle part is usually lower than in singels boots in order to give you better knee bend and mobility. In the old times when skates were made of just leather and weren't as stiff you could see single skaters also point their toes(if they cared). The newer stiffer single skates make it almost impossible to really point your toes because boot is there to protect your ankle from moving too much.
In my oppinion that doesn't mean you shouldn't teach skaters to not point their toes because if you don't do the work it often leaves the free leg rotated inwards, closes your hip and it just looks ugly. My info from boots comes from 10 years ago so maybe they have produced boots that offer both mobility and stability but I doubt that.
Now does Yuzu sometimes forget/gets too tired to keep his hip open and leg rotated, yes, but these days it's a mistake on his part rather than deafault setting. When he is focused and in the moment his work is beatiful, for example I love watching his cool downs these days, because you can see how he is really controlling his body and the effort it takes, even tough it looks effortless.