This is definitely not good news for iPhone users. The thing with lightning is that it is fucking robust. USB-C may not be as bad as the micro-USB but it is still more fragile than lightning. People should be able to choose, if you love One Connector To Rule’em all just get and Android phone.
Maybe to put you mind a little bit at ease anecdotally, I never had a USB-c plug or socket fail on me even with intense (ab)use. The same is true for my immediate family It probably happens though. I had cheap-o cables break but this is hardly the fault of usb-c
USB-C is supposedly designed in such a way that the (cheap) cable is more likely to break, not the (expensive) port.