You will:
- save money to buy new phone (cable costs just ~10$)
- it's magnetic so even more convenient to use
- magnetic adapter protects connector from dust getting inside or getting broken
- you use the same cable with adapters for usb-c, lightning and micro-usb to charge different gadgets (even older airpods pro)
- at least baseus cable supports both fast charging (20W) and data transfer (usb 2.0)
If cable brakes (at it did brake for me after ~1 year of use) you just buy new one for 10$ instead of new phone for 1000$. Keeping old phone is the most environmentally friendly option.
non-pro iphone 15 usb-c is still just 2.0 speed and most likely doesn't support usb-otg
[1] https://www.amazon.in/Baseus-Magnetic-Multipurpose-Retractab...