DeimophileUSB-Mini and Micro have 5 pins (only using 4) and are a pain in the butt to solder by hand. USB-C has 24 pins so the chance of a faulty solder is much higher. USB-C cables are typically machine-soldered. There’s also a chip in the end to identify the cable’s capabilities, something that can’t be guaranteed with a DIY cable. Additionally, they are specced up to 100 Watts, which can fry whatever it’s connected to if the voltage is stepped down wrong.