I’ve read before that this varies around the world with culture. In some places (US, UK) typical players presented with a create a character screen default to trying to make themselves. In other places (Japan) this isn’t such a thing. In reality there’s no real reason that when creating a character it should look like you. I assume everyone watches and enjoys movies where the main character doesn’t look like them. Why should it be different for video games?

Assuming this data isn’t just bullshit, any idea what country it represents? It’s definitely not where I live.

The sources are quite literally listed and in some countries more than 50% said no. Sounds like your grandparents are some of the no’s represented in the data. I’m not sure what point you think you’re making?