are arm wrestling machines useful for training?

At a fitness expo I tried observing arm wrestling machines and it immediately made me think about using one for strength training. At first it seemed like a fun and effective way to improve arm power and endurance. Local gyms had very few models and most seemed more like novelty than serious training tools. But I remembered trying strength training equipment before that looked exciting but gave minimal real results. That experience was disappointing and made me more cautious. Even small aspects like resistance, build quality, and ergonomics started to matter more. To understand better I explored more options. While casually scrolling online marketplaces including alibaba I saw many arm wrestling machines in different designs and price ranges but I am not sure if I should buy one because of my past experience. Some looked sturdy and adjustable while others raised doubts about durability and resistance accuracy. Now I am wondering whether these machines are truly beneficial for regular training or mainly for casual fun. Has anyone used one consistently and noticed real improvement in arm strength