The political deviance of BRT

I love looking at transit plans. And I love looking at good maps. WFRC's website satisfies about 75% of them.

But today, I need to call out an egregious failure:

This is a planned BRT, stretching from downtown Salt Lake to Sandy, a large suburb some 15 miles south. East from the FrontRunner station in Salt Lake, South along 700/900 east, and West on 9400 South, and then on 102nd south to Frontrunner. Except for this  weird little jog.

I know why--there is a relatively dense residential cluster at the 106th South Trax Station. But there is also a Trax station at 9400 South. Connecting the two Trax stations by BRT makes no sense. Connecting the (low-rise) residential makes no sense. Why not just continue west on 94th, and south along Sandy Expo Parkway? Or South along States Street to 102nd South? This routing adds miles and minutes to a BRT route...and for what?

There must be some political schenanigans going on.