

True.
But!
USB port is invariably at the center of the bottom side, there’s no industry standard but it’s a popular convention. Which means it’s inconvenient to hold a charging phone with either right or left hand.
Headphone jack is near the corner of the phone, top or bottom, it’s convenient to hold with one hand - left or right depends on the manufacturer, but many opt for the jack to the left for right-handed users.

Not standing on my palm exactly, but the plug is definitely pushing into it.
And forget about playing games in landscape orientation, the USB cable is totally in the way, while it’s manageable with headphone cable.