And the connecting jack is the common failure point of any cable. So it’s simply more convenient and durable.
I've got 'magnetic' charging cables. You plug a dongle thing into the socket on your phone, then the wire just connects to it by magnet.
Solves the problem of cables being plugged in and out of the phone, the cables do need to be replaced (not expensive), and if you charge in multiple locations you need cables in all of them.
But no wear and tear on the phone, and there's something satisfying when the magnet connects.
Probably too unsightly for apple folk though.