AsianReaper wrote:
I think it has to do with the fact that Shinra Tensei is gravity, not a shockwave. Shockwaves kind of ignore gravity.
Maybe it's my background in engineering, but the answer is no. If it's strong enough to push and pull objects then it can also push and pull shockwaves. It's true that in daily life gravity is not strong enough to really impact shockwaves, but we're talking about a pseudogravity.
Besides, it's not actual gravity because it doesn't follow gravitational rules. When Nagato is using an attractive force he's not pulled towards the target. It also doesn't seem to follow the inverse square law. Because if it did, Chibaku tensei would work very differently.
Hence, it's not actual gravity control.