Because if it is uncomfortable, it is inconvenient. Walking around in stiff, new shoes is vety inconvenient. Especially if walking to job interviews, carrying a baby, or climbing lonf flights of stairs.
causing trouble, difficulties, or discomfort.
문제, 어려움 또는 불편 함을 유발합니다.
Perhaps the two English words conveniently cover the meaning true to this Korean word.