Yeah, announcing you were going to delete emails unread and expecting the sender to resend when you return would NEVER fly in my office. I’d get executive complaints about that, especially if it went to a client or outside party – if a client can’t reach you, they will reach out to someone else who may not work at your organization and you lose business. I feel like this delete-it-all philosophy would only work for an entirely internal role where timelines are more relaxed, and even then, I feel it’s a bit unprofessional to foist your own catch-up work onto others, especially if they’ve been backfilling for you while you were OOO.
To successfully decompress, you know there are some odds and ends you need to tie up at work — specifically finding a way to communicate with your leads, clients, and coworkers that you’re not working, but you’re making sure their needs are taken care of.

Which to my mind lets people know when I’m back and that I will get back to them after that date, as well as who to contact for more urgent stuff. But every time, Wakeen gets teapot questions because people apparently can’t be bothered to finish reading and they both get questions on stuff that is not due for weeks after I return.
Something that actually was an issue with my employer ages ago: at one time there was a policy that out of office would only go to internal people, and nothing would be sent at all to anyone external. Apparently this was felt necessary in order to mitigate risk of burglary, so people wouldn’t know that “John Winchester has gone on a hunting trip” and that his house was empty.