On macOS, I think I've installed device drivers exactly once in the last decade, and they were for a weird printer.
Most device drivers nowadays aint necessary to solely get the device working, but to get it working well. All keyboards will work out of the box without any drivers/webusb-pages, but good luck configuring rapid triggers on your Wooting keyboard or a DPI-switching macro on your Logitech mouse without it.
macOS allows USB access without installing a driver, so that's probably why. The "driver" is just part of the app.