I’m not sure I agree. Just as it’s part of the job for someone to handle their emails, it’s also part of the job for the sender to make sure that their request is sent to someone who is available.
The reason I did it was that the first time I took maternity leave, I came back to thousands of irrelevant emails. It was a chore to sort through them, and finding the ones that were still relevant was like finding a needle in a haystack. And it wasn’t just a waste of *my* time – I often had to reach out to email senders only to hear that no further action was needed, so I was wasting their time too.

You can then come up with a subject and write your text, explaining that you are out of office or unavailable.
This is true! The nuclear option also helps the recently returned vacationer understand what is a priority and what isn’t. But, as boyd wrote, “if you just turn off your email with no warning, you're bound to piss off your friends, family, colleagues, and clients.” The blog post offers some helpful steps to make a clean break feasible — they include communicating with colleagues about the sabbatical long in advance, managing expectations of those who rely on you, creating a backdoor for true emergencies, and then, right before going away, reminding everyone about the sabbatical once again.