I think I can offer some insight here as someone who already owns an EV.What’s the purpose of installing a juicebox or other EVSE aside from aesthetics? Genuinely curious as I’m planning to just get a 240v outlet installed and call it good.
The cable that comes with the car is your emergency cable that you want in the car at all times just in case you need to drive further than expected and need to charge. So it must always be stowed in the car.
If that is your only charge cable, every time you charge at home you have to unroll this cable and then neatly pack away the cable back into your car's storage compartment every time you leave the house. These cables are thick and would be a hassle to wrangle with every day if the cable is not tethered to a wall. The solution is an EVSE where the cable hangs on the EVSE or on some kind of hook on the wall, so leaving your house and returning home is simple and easy -- no hassle with uncoiling the cable or winding the cable back up and going on your way.
So while you could make it work with just the cable that comes with the car, life will be easier with one cable easily coiled to a wall and another cable that lives permanently neatly coiled up in a storage compartment in the car for just-in-case emergencies.