Of course not. There are other options, including combat robotic modules.What's curious here, USSR, are the resources dedicated to robotics modeled here on the human form.
For a nation that might have pioneered weaponizing politics, that seems restrictive conventional ("inside-the-box") thinking.
It's like a silent black-and-white film in an age of digitized "sensurround" THX special-effect movies.
A robotic platform based on biological forms like spiders or crabs would seem more successful and cost-effective, based alone on issues of balance, center-of-gravity, and mobility. Is this robot-man the only robot form being researched?