Feel free to be skeptical, and even do a real world test on your own bike. I'm not invested in what people believe or don't, and only gave fair warning based on a general concern for protecting someone from the consequences of the unknown unknowns.

However, you've discovered the difference between theorists and technicians. The former use analysis to discover what should or could happen, and the latter make decisions based on the cumulative experience of what did happen in the past.

In any case, consider the issue as applied to a threaded tube. As the tube is flexed all the elongation is concentrated at the root of the thread. Consider how far it must elongate before a noticeable bend in the tube occurs. This is exactly why threaded axles break at the first thread beyond the cone, which is a more common event because bike makers know better that to design forks prone to snapping at a thread.