[NoboruWataya]

These people clearly do know how to use computers though, they've almost certainly been using them in their professional and personal lives every day for years. They just don't know how to use your preferred tools, and those tools aren't necessary for them.

[deprecative]

This post is literally about illiteracy of the tools used at your job. They don't need to be experts but if they can't do basics and cannot process new information they should be out on their ass.

Excuses are excuses and shouldn't be tolerated.

[bigfatkitten]

A tool which is of no use to them in performing their actual job.

They have a workflow that works just fine for them, and if they don't, they already have an abundant market of tools suited to their field that they can just go out and buy if they wish.