Its like cards. There needed to be ones that are the same because otherwise there just wouldnt be enough of each character for more than 1 person.
Think of them like baseball cards. There is more than 1 of the same.
But based on tiers there will be less of them.
There is 18 in total Dolphins per character but only 6 whales for example. Then you also have background rarities.
Thats why youre seeing a lot of dolphins being pulled and there are still a number of whales that havent been pulled at all.
Thanks!