Why is hard wiring asinine? The kits shouldn’t really even be called hard wiring anymore imho that’s when you go balls deep into doing to properly with soldering cutting and drilling which would be foolish. These hard wire kits you just pull a relevant fuse, fit a fuse holder and refit the fuse acting as a tap takes seconds and you don’t lose a USB socket or cig socket if you have one the Enyaq doesn’t for example well except in the boot.
The £20 hard wire kit is really good and can be reversed in minutes too plus you can route the cable behind the dash more easily than a cable you need to plug in.