That's not what they said. They said "nothing is cool about a tutorial on creation of threads", and that the cool thing is "achieving concurrency without threads/race conditions/shared memory" which ironically is only enabled by all the engineers who spend their time working on and maintaining those "uncool" things.

If they don't need to use threads, then good for them. But to dismiss threads and learning material about threads as "uncool" is just silly. The thing that enables that misunderstanding is all the work that's done on them in the first place.