Link decided to forego the normal weariness the sudden culture shock of going back to those days caused, it was too important to bring at least some of the old ways back to give people the impression that Zelda was the only one that took her role seriously, and that Link was merely humoring her. Too much chance that he might end up undermining Zelda's authority and her hard work towards establishing said authority.
"It does," he said. "It's not a fancy one, just 'Ser,' just like a couple hundred other people who all died in the Calamity. I really don't foresee it needing to be used all that often, but you'll insult at least Zelda if you disregard the rules and protocols that are attached to her title."