There are numerous Halochos that appear in Rambam and even HaTur, and do apply nowadays, but HaMechaber omitted it completely from Shu"A, like Hilchot Teshuva, Hilchot שמירת הנפש, Hilchot Deot and many more.

Most of them, as I can see, pertain to human qualities (מידות) and not straight Mitzvot.

What did HaMechaber think leaving those Halochos out of Shu"A and others that agreed on that?

What Halachic status do those Halochos have if he omitted them - are they still obligating Halochos or he didn't see it that way at all?