There are infinite tread patterns out there and just ... is essential to feeling confident on the bike. Running too much pressure in the tires can make everything feel rough and undamped.
The call of the wild. The thrill of conquering challenging terrain. The connection with nature that only off-road riding can provide.
Too low a saddle can also reduce traction and grip while climbing, causing you to compensate by pedaling inefficiently and bobbing up and down, which will weight and unweight the rear of the bike, ...