One brake Single-Speed fools

I don't see the point of fixed....I think it reduces the utility of your bike, whilst freewheel enhances it.

Funnily enough, I'd argue that running a single speed reduces the utility of your bike

I'm not sure about reducing the 'utility of my bike' - it goes when I pedal it, steers when I move the bars and stops when I apply the brake. Short of losing some fundamental parts of the bike (i.e. wheels/forks/braking mechanism) I'm not sure how else I could reduce it's utility?