Normal USB A ports have that little notch on the inside too. For all the years I've lived on this planet I've never broken a USB port. USB C is perfectly fine.
The worst part of lightning is how flimsy it feels once it's been worn in.
Plus having the connectors inside with something to line it up seems like a battle hardened design choice now. Unless you're an idiot, you're not gonna break anything.
Fwiw I broke I think more then 10 micro usb cables / ports throughout the time when they were everywhere, it was kind of prone to breaking. Never managed to break a regular usb, mini usb or usb c though. So I don't think proneness to breaking is inherent to this design, but the opposite isn't true either.
I have broken at least two female USB-A ports, with a cable pulled sideways tearing the inside tab off. Luckily, this always was on motherboards that had a spare one just next to it.
In later revisions (at least starting with micro USB, perhaps mini as well), the cable was explicitly designed to be the part prone to breakage, as it's easier to replace.
The worst part of lightning is how flimsy it feels once it's been worn in.
Plus having the connectors inside with something to line it up seems like a battle hardened design choice now. Unless you're an idiot, you're not gonna break anything.