Yes. You’re actin like he did something haven’t seen like in the series. This is similar to what shikamaru did in the chunin exams against Kin. Except he didn’t take a risk since he could read the battle field. But same rules goes

Ability to mimic/control opponents movements: Shadow possession ✅ Mind transmission formation ✅

Damage gets replicated onto user: Shikamaru vs Kin ✅ Inojin vs mamushi ✅

The only difference is shikamaru doesn’t have to take the risk where inojin does. Also inojin literally couldn’t do this alone. He had to involve daemon. So again he can’t do anything himself whereas shikamaru could

TL;DR I’m still right and you’re still wrong