Why won't my Samsung Tab 4 with 4.4.2 let me set a default calendar using OK Google?

[AC Question]

If I have more than the Samsung calendar installed on my Tab 4, and ask OK Google to set an appointment... I have to manually pick the calendar to send it to. It won't let me set a default calendar. What good is voice control if I still have to pick the calendar manually? Got to be a solution, HELP!!