When inserting a car key into the ignition, I am able to do so quickly and easily, without having to carefully line up the key with the keyhole. I can do this despite the fact that the keyhole is usually behind the wheel, in a spot I can't even see. Most car ignitions seem to have a "funnel" around the keyhole to make things easier, guiding the key into the ignition.
House keys, on the other hand, are not quite so user-friendly, and require careful alignment of the key and keyhole. More than one attempt might be required if the key misses the keyhole by even a little bit. Attempting to insert the key even while looking at the lock isn't guaranteed to succeed on the first try, and it becomes downright difficult if it's dark out or the lock is otherwise obscured.
Is there a reason why these are designed differently? I'm not asking about cut-edge vs. grooved keys, or electronic chip access, but rather the actual process of inserting the key into the keyhole.
So far, comments have discussed the idea that since houses are a bigger investment, there's less competitive pressure to improve such a small component of the whole. Still, it seems to me that locks can be easily replaced, and that a lock with a similar "easy-insert" design wouldn't be particularly more expensive than a regular door lock. However, I have never seen a door lock of this type, which strikes me as odd. It seems to be better design, and not any more expensive, which is why I'm looking for a more compelling reason for its nonexistence.