The laptop keyboard is a thin membrane with the plastic keys mounted on top. It’s completely separate from the rest of the machine, and replaces (with some minor disassembly that would be difficult for you or me, since we don’t do this often, have the tools or the experience, but takes an experienced tech about five minutes or less). It sits on top of the “guts” of the machine, and like I said it’s a pretty inexpensive replacement.
But for a laptop getting that kind of use, I’d also recommend a “port replicator” (a.k.a. “docking station”) and external monitor plus external keyboard. I only use the keyboard on my work laptop a few times a year when I’m on the road or in remote meetings away from my desk setup (where I can use both the external monitor and the laptop screen to make a super-wide virtual screen). The full-size keyboard is also a lot more convenient and comfortable for routine keyboard work.