Apple has a long successful record of pandering to kids, juveniles and the easily amused. A strategy to hook them when they're young making lifetime customers. Appealing to their narcissism with Memoji, emoji, cutesy animations and such.
The "Contact Photo & Poster" feature in Apple Contacts is an excellent example of this. It consumes a huge amount of space and can be quite annoying for those who just want to use the phone without being entertained at every turn.
Although there are many aspects of iOS I enjoy Contacts isn't one of them.
Apple does what Apple wants and while frustrating that's their prerogative. They've got plenty of Apple apologists that believe they can do no wrong and eagerly hand over their money.