Convenience and just map makers decisions

What direction a map is doesn't matter only which way you are facing, where north really is on the compass, and that you know what way north is on the map

If your map isn't a perfect square area like say a long oval park you can flip it any way to fit regular paper better or maybe it's a face like shape and you want it right-side up for quirky tourist things, or maybe just so the entrance is on top or bottom to somewhere to avoid confusion if it's not perfectly in line with a cardinal direction

You only really want north to be always up when it's large and official Iike states, continents, city's atlas maps, ect also mostly just to avoid confusion