Yes I see your points.
For me remember I have covered ~10,000km in less than a year
remember daily driver. This is why I don't quote "time" it's rather what you do in that time that is much more important. Also the cycles from cold to hot, true street use all has an effect, rather than just getting in and covering 10,000km straight........... bit like rotaries passing bench tests NSU/Mazda style then failing at 1/3rd the distance when use in the real world by owners and not in a laboratory
Regardless, if you send me an E-Mail I will send back the failed sensor for you to see yourself on my own car, cause that is the one I can vouch for 100% myself in the time I used it and km's covered, happy to send you other matching information logging its use off the ECU as well.
The sensors them selves look o.k. (build finish etc) but the bit I don't like on any of them is how weak and flexible the "element" is, it is easy to see how it could fail in "time".
Like I said its not an attack on you or for me to sell others etc, I have no interest in that at all, just so when they do break (some rotary owners will never ever reach 10,000km or more of true daily use) then you know that at least someone else has told you what the problem is.
I do come across all kinds of similar things "that no one else has ever discovered"....... this is not the first time and def will not be the last I'd say based off experience.