Jessica Jones seems to just not GAF about superhero standards, so she can’t be bothered to wear a disguise.
And Danny Rand’s battles were mostly with The Hand, which operates secretively enough that the outside world wouldn’t know about their struggle.
Luke Cage was a major public figure in Harlem during his season, actually encouraging his community through his lack of anonymity.
Funny enough, it took this clip for me to realize that Daredevil is the only hero who bothers to conceal his identity (and obviously, the only one to wear a costume).