Honestly it really depends on where the people are. People in NYC parking on the stree with millimeters to spare? Sure.
Those of us in smaller midwest cities where we can parallel like a boss and have 3' of clearance in front and behind, probably less important.
Even when I had parking assist in the Yukon I never trusted it, I didn't know it's margin of error. The only time I really ever used it was in parking garages to make sure my rear end wasnt hanging out in the aisle. But again, I came from a newer vehicle without any real parking assist to M3 without USS....no harm no fowl *shrug*
Something always matters to someone, while many others don't care