This here is the difference between theory and practice. Our minds are to feeble to understand reality.

When I was a kid (many, many moons ago) I found a solved Rubik's Cube in a house where we were staying. I played with it and soon enough couldn't put it back in its solved state.

So I took it apart and rebuilt it 'properly', which didn't take long and wasn't too hard. I wonder how many people did the same.

My kid wanted to jump 3x3x3 and go directly to a 4 cube. I freaked out when we messed it and thought we could never solve it, because you can't disassemble a 4 cube into pieces like a 3 one. In the end it's not so difficult: like a 3 as you move around the two middle pieces of each edge together like one.