I mean, from an engineering/repair POV, these sorts of short-term, user-correctable connection faults are a good trade-off for having fewer long-term, actual-repair-needed "junk getting in there and breaking something" problems.

See, on the complete opposite end of engineering robustness: the butterfly keyboard. The hinges in those things just loved to hoover in debris, and then ground themselves apart, with user repair (i.e. popping off the keycaps to get the debris out before it can break your keyboard) being "inadvisable" at best (i.e. likely destroying the hinges just as well as the debris would have.)

> Lightning also has that problem where the 4th pin burns out and now you have a cable that charges one way.

This is true, but it's due to the electrical design (sense and VCC right next to each-other), not the physical connector design. If USB-C had used a Lightning physical connector, they could have corrected this problem just by ordering the pinout differently.