In another instance, a photographer complained that his monopod was too heavy. Perhaps he should have compared the weights of different monopods first. There are so many camera monopods available for purchase, there is no way you can't find one that is the right size, weight, strength and has the desired accessories.
Hikers can walk and use camera monopods with fluid head attached but it does throw off the weight and balance. This will make it your monopod-walking stick a little top heavy.
Walking sticks or "" exist that have a 1/4"-20 threaded stud on the top of the handle, usually covered by a cap when not in use, allowing them to double as a camera monopod. The user would usually need to carry a ball swivel adapter separately and mount it as needed.