The wandering Arabs are more hard in disbelief and hypocrisy, and more likely to be ignorant of the limits which Allah hath revealed unto His messenger. And Allah is Knower, Wise.
Times are computed by method; your mosque's timetable governs the adhan. Every text carries its source and grade. Nothing here is a fatwa, a prediction, or a substitute for a doctor: your own scholar decides what is contested, and the tradition itself says the practice is alongside treatment, never instead of it.