Headers' font is hardcoded?

h1,
h2,
h3,
h4,
h5,
h6,
.h1,
.h2,
.h3,
.h4,
.h5,
.h6 {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: 500;
  line-height: 1.1;
  color: inherit;
}

When overwriting the default font in body, I'd expect this to be inherited for the headers too. Is there any reason for this or it's a mistake?

BTW, since normalize.css sets the default font in html shouldn't Bootstrap set it there too? In this case you could remove "sans-serif" from your font property.

EDIT: I guess this is done on purpose after looking at type.less... Perhaps it should be set to inherit as a default then?