YOU are raising some valid points... but based on the OP's other comments, they seem to have a very limited knowledge of statistics--and yet, they are pushing a very critical line on this topic.
OP is asking other posters to do quite a bit of homework for them... As in, "Is this study big enough?" <<YES>> "OK, but how big does it need to be to prove X?" ... At a certain point, it seems clear that OP is not arguing in good faith, because they feel compelled to make the critical statements, first, without understanding the topix.
I would caution you to not extend sympathy to OP's cause, simply because you happen to share a critical eye for this study. There is a HUGE difference between being right for the right reason, vs the wrong reason... and that's how we get crap like Ivermectin for COVID.
OP is asking other posters to do quite a bit of homework for them... As in, "Is this study big enough?" <<YES>> "OK, but how big does it need to be to prove X?" ... At a certain point, it seems clear that OP is not arguing in good faith, because they feel compelled to make the critical statements, first, without understanding the topix.
I would caution you to not extend sympathy to OP's cause, simply because you happen to share a critical eye for this study. There is a HUGE difference between being right for the right reason, vs the wrong reason... and that's how we get crap like Ivermectin for COVID.