There are Sangheili Doctors they are just not looked apon with great honor but they exist. I’m sure that when the need for doctors gets out than it will raise more of an honorable position.
But change is hard for alot of people especially if it is something they have only known for thousands of years, but as history has shown with us, when they change comes and the people adopt it they pass what we even have. Since the Sangheili are basically the Space Japanese just think how they modernize so fast that they went on a rampage through Asia with no sign of being stopped. Remember the reason America fired the nukes is because President thought that the only way to beat the Japanese conventionally would cause for their entire people to be wiped out and neither faction wanted a war like that. Too many dead just for a something that could be solved easily.
Now think of it on the Scale of the Sangheili who has always been superior than us in Tech with the modern thoughts of humans based tactics an weapons along with their High Honor Status. Basically Modern Halo is Forerunner Tech which dominates everything The Covenant or we humans have made now what if they were to lose the mentality that Forerunner tech is holy. They would not longer revere engineer they way they did before, they would blow us out of the water.
Remember one of the main things holding the Covenant back was the lesser species like the grunts. Instead of entire squads of Elites being sent into battle and manning star ships and vehicles grunts, drones, engineers and lekgolo worms did those jobs. Thought Lekgolo weren’t as incompetent as grunts i would much rather deal with a squad of grunts being lead by an elite than a squad of Minors being lead by a major or even worst Ultras leading Majors. Not to mention that if grunts weren’t around as much to hold back the Covenant from ground engagements.
Just thinking about Elites deploying Hunters and drones as average troops would be terrible. Our only hope would be trying to defeat the elites after they using forerunner tech and treating every species as equals while not employing grunts they would jump on the treat level. Think about it just Hunters, Elites, and Drones. Since elites never really liked jackals so i’m assuming they would just use them for info instead of troops.
Fighting a force with better information, technology, troops, tactics, and see death as a glorious release would be an impossible foe to defeat is what i’m getting at.

