Exactly. USB is designed so that you can have multiple devices attached to one port. 7 slots on the PC is plenty.

And in fact, they probably already have a hub. I can’t remember the last monitor that I bought that didn’t have a couple USB ports on it. Put that thing to use. Webcam, USB headset/mic, keyboard and mouse can all run perfectly well off a monitor hub as can most other accessories. Save the direct ports on the mobo for things that need the bandwidth like storage devices.