It's not silly at all. Are you saying it does have a quantitive unit of measure? If so, what is it?
Here are the definitions of the words you seem to be having trouble with:
Quantitative: How much evidence - the quantity of evidence
Qualitative: How good the evidence may be - your opinion.
Why don't you look up the words rather than ask me to explain it to you - don't be so intellectually lazy.
You are making a quantitative statement (speaking of the amount of evidence) and then you try to back it up by making qualitative statements (you don't think the quality of the evidence is good) - very illogical.