There are sages in real life (or analogues), but they aren't all martial artists. Some form schools in the mountains where everybody just meditates. Then there are those who just never sits down, or never moves their arm. They either minimize doing the daily necessities of a normal human being...
"Have you thought about quitting adventuring?"
Girl, he literally just started.
And Makina, what do you mean by family? You barely know two of your party members. The other guild members aside from the gun girl are practically strangers.