Why spoke wheels are provided in adventurous bikes?

As there are two type of wheels spoke wheels and alloy wheels.all the adventurous bikes were provided with spoke wheels because they were made for off roading or terrain areas,the small rocks may be pathholes for the wheel of bike which can cause any inciedent and these wheels are more durable than the alloy wheels these type of wheels are provided in the bikes like himalaya,royal enfield,harley etc.

Alloy wheels are only provided in the sporty bikes like yamaha,honda,ktm,suzuki etc.as they were made for simply city driving.

Thank you