I am one of the few who have sailed those waters. (1975, 40’ Trimaran sloop).
In those days the Singapore straits and Malacca Straits were where the pirates were and I sailed through there I was heavily armed (including LAW missiles).
In these days I think anyone sailing that route (Arabian Sea - Gulf of Aden) is irresponsible at best. For ‘round the world sailors traveling Mauritius- South Africa is the sensible course.