Fwiw, it appears you're saying "[human] sign language is complex; simple use of physical signalling is not language". But, your statement could be read as disparaging sign language as "not language", something I'd strongly refute.
I said that sign language has linguistic structure so it's language.
Proper language requires this structure, just making sings is not automatically language. Just the ability to signal using single atomic words, in some medium (signs, verbal, written, machine) is not a language.
