IDK, have you tried to copy files over USB-C/USB 3.0 to a phone? I similarly thought it was going to be much faster than it actually is, but it’s still mind bogglingly slow using MTP – especially with file creation operations. Want to move 5,000 small text files totalling 20MB? You’ll be there for 8 hours, haha.
In my experience ADB is significantly faster than a cable (even USB-C+3.0), even when ADB is connected wirelessly. I typically get 20MBps-40MBps using ADB regardless of whether I’m writing large files or a bunch of small files, where at best I will (and a cursory google search sems to indicate most people will) see 8MBps-10MBps over the cable for large files, and when I’m copying small files (e.g., game roms for ScummVM or something), I will get maybe 1Mbps at the top end. Results are consistent between computers I use to copy, cables I use to copy, and phones I’ve copied data to.
I’m honestly surprised that in 2024 copying data to a brand new flagship phone using a USB cable is as poor of an experience as it is.