What’s more likely, misplacing your car keys, or misplacing your phone?
Are there cars that let you drive them without the key?
My car allows me to unlock it with a phone from the other side of the planet. But to actually drive, it requires the key to be inside.
Yes, lots of cars (particularly relatively new ones) allow Phone-As-Key, either via UWB (so the phone can stay in your pocket) or NFC (so the phone has to be placed on an NFC reader).