I think you are very confused about what a reductio ad absurdum is. It is not a fallacy, it’s a perfectly valid form of argument (similar to a ‘proof by contrad

I think you are very confused about what a reductio ad absurdum is. It is not a fallacy, it’s a perfectly valid form of argument (similar to a ‘proof by contradiction’ in maths), and it doesn’t seem to be what you mean here.