I dunno – I think it says more about the writer than the culture. I worked in tech where there were always a handful of people who would do stuff like this, but most people would keep it basic. I just think some people love putting funky or gimmicky twists on rote stuff.
Education Details: An out of office message is a compact text that conveys the most important facts: How long you’ll be unreachable, when your contacts can expect an answer, (optionally) the reason for the absence, and, if necessary, a personal note. A referral to another email address, e.g. to one of your colleagues, is often helpful or even necessary.

The holiday out of office best wishes are sent to the offices when the staff of the office remains out of office for the holidays. The wishes are sent to the office marked to the staff to make them feel good. The wishes can be sent through mails and text messages to the office mails and numbers.
There’s a department at my workplace where this is common practice too. My old department worked with clients in similar ways, and I was half expecting we’d also be required to do it, but luckily that never happened. Further proof that, at this (generally progressive, flexible-working) company, your actual work-life balance heavily depends who manages you.