-> Ordered by Dragon, that's what commanders do, they order underlings to go do shit. His commanders becoming more renowned helps the cause more than Dragon doing things himself, he already as renowned as you can get far more renowned than the admirals or emperors as established pre-TS. Furthermore, would be stupid to risk the Commander-in-Chief getting captured or injured over a raid.
-> After that was stated, Sabo went on to report to Dragon, the man in charge. Dragon again showing, he has 0 care for fame.
In what world is Dragon getting upstaged? Oda literally drew this after the events you stated......
This happened at end of egghead, idk how you saw this scene and thought lil Sabo is upstagging Dragon or a bigger factor for the RA than Dragon.
If you're in it with Dragon expecting him to fight anytime soon, you might as well move on to a different character tbh. He's not getting used as a fighter until Final War. Oda is too deep into his buildup to waste it anytime before the final war now.