The car uses a phone as your key. If you don’t like it, use the card. If you like neither, don’t buy the car. It’s really simple. Asking a company to re-engineer something that works is a bit unrealistic.
Let's recap: Tesla has working keyfobs for the S and the X.
So they needlessly re-engineered something that worked when designing the 3, just to cheap out on an essential item like the fob, which costs them more to produce than the keycard (obviously, since the card also doesn't offer any of the convenience features of a fob, like pressing a button to open the trunk or frunk).
Instead, they gave us the phone-app as a key, saying that "you are a funky tech-savvy person because there can't possibly be any other reason in the world why you would buy a BEV. So you must of course have a smartphone as well and love messing around with its settings, etc.".
Hey McFly, get this, there are people who hate smartphones, abhore (a)social media, yet care for the environment or have a multitude of other reasons for buying a BEV even though they don't have a smartphone. After all, a car is a car, electric propulsion is just a different kind of engine, and for many people, the advantages of that are enough reason for switching from a conventional ICE.
Why do you have to be a nerd to buy a BEV? BMW styled the i3 and i8 with that mindset, Tesla engineers its UI with it in mind. Guess what, far more people would change to BEVs if they were just like your normal car, only with a battery and electric drivetrain with all its advantages.