It's nice to see the addition for people who don't want to make their own skins, but really I think this is just a thing so that people on console or bedrock editions of the game don't have to pay for extra skins. I still think the whole skin pack thing is a fucking scam and no one should ever play anything but Java minecraft, but that's just my opinion, I know there are some avid bedrock fans out there

Edit: diversity is always a good thing, the original 2 characters were absolutely whitewashed and bland. Mojang is a company that has prided itself on its diversity of its community since its conception over a decade ago, it's about time they actually added a more diverse set of free to use skins to include all types of players