IMO, the selling point isn't that you can carry around the ports you might potentially use and swap them out whenever you need them, it's that you can buy a machine that's tailored to your setup and peripherals.

I bought a laptop at the beginning of 2020 after the GPU on my old one fried. What I wanted was something with a Cat6 and DisplayPort built in for when I'm in my office, and multiple USB-A ports for the peripherals I use (mouse/keyboard/mic/speakers). I had to settle for one with a single extra USB-C port, an additional USB-C hub to get enough USB-A ports and a Cat6, and an adaptor for the built-in HDMI port to hook up to the DisplayPort on my monitor, which set me back a total of like $100 on top of the cost of the laptop itself. The laptop also has a headset jack and large card reader that I have yet to use, so that's just wasted space that could have potentially been something I would have actually used.