Roman sensibility rears its head:
Appropriate instances are to be defined by the rubrics in which a liturgical service may be substituted for the divine office.
In particular cases, and for a just reason, ordinaries can dispense their subjects wholly or in part from the obligation of reciting the divine office, or may commute the obligation.
Although the major hours may be appended to a celebration of Mass, I’m really at a loss as to what kind of liturgical services may be substituted for Lauds or Vespers.
Just as an aside, When I was pondering the possibility of an eventual marriage in my 20’s, I did think about Friday Vespers as a setting for the Rite of Marriage if I were to wed a non-Catholic woman. Or possibly a lessons and carols format, which is essentially the Office of Readings.