There’s a lot of fuzzy argumentation here. Hands undoubtedly make tool use easier, but simple tool use has been observed in corvids and dolphins, but there’s no sign of world domination by crows and aquatic mammals. Likewise, monkeys and non-human apes have hands and have been observed using tools, but they are certainly not human. Even raccoons have hands.

What makes us human is the combination of intelligence and tool use.