Well look at it this way, you are thinking of how you would use it not others, unfortunatly, if you are travelling with the car, the roaming connection doesn't work. What's the alternative, we'll WiFi connection to your roaming phone. In some markets the TRA have locked access rendering the cars...
I dont believe it would damage the 12V battery else I would have faced that with my Tesla.
It makes sense to allow for WiFi connection specially if you are travelling with your car over seas and the roaming package doesn't work.
More so, in UAE, the TRA does not have a deal with Porsche yet so...
Android auto was connecting wirelessly to my Taycan, then one day it stopped and i am having to connect it via the port. Tried different phones but doesnt seem to work either.
The only change I noticed is the fact that I am no longer able to access the Internet when connected to the cars wifi...
I got my Taycan from Germany, not able to connect as the integrated sim only covers Europe. Ability to connect to wifi would have been a smarter option.