This is true. I'm a bit biased as that is what I would do. I'd say most users will not even notice. I think most of us here on lemmy are tech heads though and we would be the ones who do connect our phones to PC.
Honestly I only recently realized I don't have a cable supporting USB Super Speed, though I detailed that in a different comment and I don't want to repeat my self.
If I understand how USB Super Speed (ie USB 3.0+) works correctly, it is trivial to limit a USB C port to USB 2.0 modes, as it uses extra connections, which, I think, means you can just not connect them and treat the port like its a USB 1.x/2.x port. Not 100% sure tho
You're entirelly correct - if only the D+ and D-data lines (plus VCC and GND) are connected (and USB-C is meant to work no matter which way you plug it so there are one of each on each side) then it will just behave as USB 2.0