What if your laptop is broken? You should be restricted from getting a job? What about if you just landed in the US and didn't want to have to present it to the authorities to scan and plan on buying a new one because they are cheaper there. What about if a family member was currently using it. There are plenty of valid reasons why you might not have a laptop in general or at the moment in your life.

Some people share laptops, others don’t have one at all and are fine with a tablet or smartphone.

I've done all of my recent interviews on an iPad.