I don’t want to pay for 300gb of overpriced iCloud storage. That’s the use case.
Are you syncing all of your data off of the phone via the cable and not wifi?
Setting up a network file share or FTP server or whatever and the app to access it is muuuch more effort than just plugging my phone in and using it like any other flash storage device, plus USB3 transfer speeds are better.
For me it’s just simpler and less prone to error is all.
Lol, you can literally have a simple program running on PC which syncs the phone automatically via WiFi while charging overnight.
For easy fast sharing over local LAN there are services like https://pairdrop.net which are far from hard to use. It may not be as fast as USB, but in most cases it works well. I just wanted to point out that sharing things over LAN is not that hard.
Even better service is LocalSend.