Were did you take you "80%", I'm guessing straight from your imagination... And, I'm guessing that's the only way you can prove anything, starting with that imaginary 20% affected and then going on. If the premise has no basis in fact. It's not an argument you can demonstrate. Simple as that.
Also, weak is only relative to actual use. If you apply a hydraulic jack to a Iphone, even one made of 1 inch metal, it will bend... But was it weak for use in someone's pocket... No. Since that word is relative to whatever point of reference the person has defined, it tends to be abused quite a lot in rhetoric and should be avoided. There's a whole list of those kind of words that exist.
So, a baseless premise, the use of "weasel words" (google what it means) and than a non sequitur personal anecdote...
Yup, that must mean you speak "truth" (sic), no question.