In the aether, lone floating blocks will generate. See attached:

https://drive.google.com/file/d/11dNfIK0xsonRMqnX1ID8QZsBd69WtkrS/view?usp=sharing

I figured. Flying around at fast speeds may make them seem more prevalent than they really are, also.

There's not a whole lot that can be done about this. That's just an artifact of Minecraft's worldgen. They do seem relatively common in that video though.