As I understand it, it's not about “not being interpreted as nuclear strike” — since almost every Russian missile (including anti-ship missiles like Kh22 and the likes) could potentially carry a nuclear warhead, they explicitly don't care about the ambiguity, while the Western doctrine is diametrically opposite, explicitly aiming for as little ambiguity as possible to keep the escalation risk low. And your interpretation basically goes against both doctrines. — But more about keeping a low trajectory so that the missile stays below the early-warning radar horizon for most of its flight, striking without warning, where a ballistic missile gets within the LOS of radars quite early due to its trajectory.