The pin pitch only matters for high power application to prevent arcing, and that can also be resolved through the most modern USB-PD standard (See: USB-PD Extended Power Range, which can support up to 240w), and the electrical adjustment you have to make are all on the device side.

I don't know about the resistance forming between the pins, for low cycle applications the cheapest gold flash plating would easily last 10K plug cycles, and accounting for corrosion from hand sweat/oil/hand lotion, many companies favor going for thicker hard gold or platinum plating nowadays. (Rhodium is the absolute best, but it's just too expensive now to do at scale because they are used in catalytic converters for electric cars). USB-C lasts for many more cycles than the Micro-USB standards before it (You can read the 4 axis and wrenching test standards for mechanical testing on the USB spec) so I'm not sure what you are talking about here.