If the guy has a rifle and is shooting at you...say...from a belltower in Texas....
Quote from an officer on the scene:
Ramiro Martinez, an officer who confronted Whitman, later stated in his book that the civilian shooters should be credited, as they made it difficult for Whitman to take careful aim without being hit.
No, rifles have no defensive use do they.......
Rarely? Sure. Never? It's happened at least once.
And, again in Texas (why do we get them) a non-LE engaged a rifle wielding nutcase in Tyler TX with a handgun, even though he had a rifle close by. Unfortunate that he chose to use the handgun, it cost him his life. Maybe if he had picked up the rifle? We'll never know.
Then there was the guy that worked for HK who defended himself and his girlfriend with a full auto Mini-14, can't remember his name at the moment.
I'm sure there are plenty of others, I haven't had enough coffee yet.
There is absolutely a case to be made that rifles can have a long range defensive use, it's just very rare.
As for the OP, it's important to look at the cases where a rifle was actually used defensively. In all of these I've listed the rifle was used away from it's owners home. The rifle was in the car with them. Something to keep in mind as you shop, if you live in a state where you can carry long guns around you want something portable.