Symbolically it might mean he’ll always be by her side, through thick and thin, and will protect her from anything. He opens the door for her A gentleman would help her up into the carriage as a sign of his protection and strength.
As a result they hide – often in plain sight, but hiding never the less.
The gentleman opened the door for her so she wouldn’t have to drop her dress in the dirt. He doesn’t LOL for the sake of attention “Frequent and loud laughter is the characteristic of folly and ill-manners…”Letters to His Son on the Art of Becoming a Man of the World and a Gentleman (1746).