Your first paragraph didn't have "dare say". And you can't just add that as a disclaimer to any factual statement to make you immune to needing evidence. If you made that guess based on how much you like the ports, then you're wasting everyone's time. But again, you said "real world failure rate is much higher" as a flat-out fact.
The previous comment did not mention any numerical figure in the first paragraph, only that rate would be much higher due to the aforementioned reasons. I left it intentionally ambiguous by not specifying a number for a reason.
The rest of your comment is not worth a substantive reply considering almost any passing reader can see through the attempt to stop the conversation with a dismissal.