Then check out this comprehensive article: How does his style fit into the TCG world

Akim, the Soaring Wind Blue, Loyal Raptor Chizak, Apex Arachnosaur Devil Dinosaur Etali, Primal Conqueror Etali, Primal Sickness Etali, Primal Storm Gert and Old Lace, Runaways Ghalta and Mavren Ghalta, Primal Hunger Ghalta, Stampede Tyrant Gishath, Sun's Avatar Illuna, Apex of Wishes Illuna, Apex of Wishes Indominus Rex, Alpha Indoraptor, the Perfect Hybrid Itzquinth, Firstborn of Gishath Kalamax, the Stormsire Kephon, Rage Incubator Keruga, the Macrosage Kogla and Yidaro Moon Girl and Devil Dinosaur Nezahal, Primal Tide Pantlaza, Sun-Favored Sauron, Dino Devotee Snapdax, Apex of the Hunt Snapdax, Apex of the Hunt Spider-Rex, Daring Dino Stegron the Dinosaur Man Terrian, World Tyrant Tetzimoc, Primal Death The Tarrasque Thrasta, Tempest's Roar Tyrox, Saurid Tyrant Vadrok, Apex of Thunder Vadrok, Apex of Thunder Yidaro, Wandering Monster Yidaro, Wandering Monster Zacama, Primal Calamity Zetalpa, Primal Dawn Zilortha, Apex of Ikoria Zilortha, Strength Incarnate Zog, Triceraton Castaway

The justification at the time was that this would allow designers to really focus on that one Planeswalker to make it feel more impactful than some of the lackluster Planeswalkers we've been seeing
A creature entering the battlefield under your control during your end step won't cause the ability to trigger