Which is one of the things these problems really test: determination and effort. Look at the author of this piece - they said they studied a lot and did a ton of interviews over months. That alone is a huge positive signal that they would be someone I would want to work with.

Also, it's not like these types of problems are irrelevant. Being able to understand things at a lower level (data structures, algorithms, etc.) means that there is a very high likelihood you'll be able to "dig deep" when encountering tricky technical problems on the job.

I'm not saying these technical interviews are the end all/be all for what is needed to succeed on the job, but in light of how in vogue it's become to bash technical interviews (often without a viable alternative), I think it's important to point out they have a useful purpose.