I guess i just doubt the complete absence. Maybe people have different expectations of what imaginations would be. When I “see” a pink elephant, it is extremely fragmentary. If it were output directly, it’d be a mess. Also, not all at the same time.

It might also be that there are differences in the amount of attention given to different kinds of imagination.

But the way the brain is structured, everything is firing all the time… or at least, that’s why it is so hard for me to conceive