So I imagine the ottoman commanders have laid out some facts to the govt if they did invade an annex.
1st: no Rashidi Oasis town can withstand an Ottoman assault. Artillerly, bombings, or if the Ottomans felt truly malicious chemical weapons would force a surrender in days if not hours and once the main areas to receive food and especially water is in Ottoman hands the Arabs are going to have to either face the Turkish guns head on which is suicide or eke an even harsher existence out in the desert and most likely prey on each other weakening any chance of a coalition or far more likely breaking it forever.
2nd: the Rashidi are a pre-industrial and barely agricultural society. The majority of the population is nomadic meaning a major loss in men due to war, capture or disease would set this nation back decades. famine and disease would no doubt follow killing off probably more people than the actual war itself. Basically this land isn’t going to be productive and be very depopulated but hey that does mean it’ll probably be very quiet. But hey those few areas where you can grow something can be settled by new people something which can be used to soothe any ruffled feathers from the local tribes in the empire.
After all the concept of stripping a vassal of his lands and privileges for incompetence and disloyalty just means opportunities for others.
3rd: simply put numbers is in the Turks favor in otl Saudi Arabia had a population of 2.73 million but Saudi Arabia also had the much more populated coastline of the Hejaz, Yemen, and Basra Vilayets to beef up the numbers. Now though I can’t imagine the population even breaks a million and that’s me being generous cause I can’t find a population density map for 1919-1920 but modern ones place most of the population in the regions of Makkah, Jizan, Bahah having the most ppl. With the next most populated regioms being Asir, Al Madinah, Quassam, and Ridayh.
The Arabs only have Ridayh and Quassam in their hands and Ha’il along with the other regions in Rashidi Arabia have even less population. And it’s a mostly nomadic ppl spread out across a desert it can’t mobilize its population let alone arm it.
4th: God is on their side, Islam is an important factor in everyday Arab life and the Sultan is the caliph of Islam holding onto the holy cities, defender of the faith, etc… so fighting against him isn’t something pious Arabs would like to do and that can be swept aside with excuses of “not fighting the caliph but his corrupt advisors” shit like that. Which only lasts as long as they win… once they start losing this is a clear sign from god you goofed and to the less religious this is a sign to look for better options and god told me to betray these infidels is a good out. And while the Arabs may not be superstitious idiots but if the army comes in and trashes these fort towns/oasis’s that have stood since somebodies grandpa was a kid and bring low chieftains that have existed for decades and they claim god is on their side. The Arabs are far more likely to take that reason as fact.
5th: The British have no reason to get involved, the Ottomans serve their interest better as a counter balance to Russia or Austria and now that Italy’s communist… well an invasion force from Tunisia to Sicily is nice but from Albania to Otranto is useful too. So any Arab expedition will be a one on one between the Rashidi Arabs and the Ottomans.