I was pretty clear, and so was the original study you linked from nature.com. If you can't follow the reasoning of something that simple, should anyone take your claims to be coming from someone who knows what they're talking about?
From the second meta-study you linked:
> We found significantly higher secondary attack rates from symptomatic index cases than asymptomatic or presymptomatic index cases, although less data were available on the latter. The lack of substantial transmission from observed asymptomatic index cases is notable. However, presymptomatic transmission does occur, with some studies reporting the timing of peak infectiousness at approximately the period of symptom onset.
They state very clearly that though their analysis showed a lower secondary attack rate from asymptomatic index cases (0.7-4.9%), they have limited data from which to draw that conclusion, and that presymptomatic transmission does occur. Which means, you can catch SARS-CoV-2 from someone who doesn't know that they're sick.
That's according to the study you linked, and it's far from the claim you made that asymptomatic spread is "actually highly unlikely".