Makes it harder to fire you? I can't think BYU-Idaho fires many untenured professors to begin with.

Tenure is also about academic freedom. BYU-Idaho has almost no academic freedoms anyway, so that aspect of tenure is also negated.

Being tenured allows you to move to a new school and request to be brought in with tenure or a shortened path to tenure. But BYU-Idaho's "tenure" positions are unlikely to garner much creedance to begin with, so being tenured after three years doesn't carry much weight.

Essentially tenure at BYU-Idaho boils down to a change in the name of your position and a pay increase. Which essentially occurs with every job after three or four years.

You get what you pay for with a tenure track position that only takes three years to fulfill.