Why is that?

In over 40 years I can't recall ever having a patch fail except with latex tubes which I rarely used. Like I said earlier I had one tube I rode on as my main tube that had 13 patches on it before I got another flat that was in an area next to another patch that would have made it difficult to patch. Every tube on any of my bikes I have now have at least one patch (except for the touring bike and the rear tires that have a flat liner, those haven't gotten a flat yet to be repaired) So I often wonder why some cyclists refuse to ride on a patched tube that when patched correctly are problem free.