There used to be real craft, based on the physical world, in creating that movie magic. It took a lot of knowledge about different stuff - materials, photography - to create this.
What do you mean, used to be? There still is, more than ever.
You might be surprised at just how many modern effects are still practical, not digital.
There's a studio here in Brussels that is similar to the one I work in. Very clever and genuinely nice guys I like to chat with from time to time.
I was surprised how they did the Logo for Arte a few years ago. https://youtu.be/gEWWo5VCQ6A
And still today - most people probably don't realized that the Windows 10 desktop background was made using practical effects:
https://gmunk.com/Windows-10-Desktop