Who doesn’t love a bit of decoding? Why use basic words, when a broad range of emojis can spell out exactly what you want to say, but in a much more interactive and fun way?
I’ll be out of the office on vacation for the next week. I will probably see your message because I don’t know how to relax and will likely respond if I feel that I need to help in any way. Otherwise, I’ll get back to you when I return. Thanks! If you don’t feel like adding to my workload, please contact [name] at [email] or [phone] in the meantime.

I do feel like the person who wrote it may have some issues in their organization with, oh let’s call it fire fighting. People who don’t necessarily think through the process of who would be most effective at dealing with the problem at hand. This reads like the message of someone who is used to getting everything dumped in their email and this OOO is an attempt to manage expectations and distribute issues to the people most able to quickly and effectively deal with a range of problems
I mean, sometimes I put up an OOO because I’m on vacation and not checking email. Sometimes I put one up because I’m travelling for work and will only have sporadic access to my laptop, but might get to check once or twice a day. In my role, it’s important to make that distinction. Maybe it’s not so important for other people.