Copying from my comment below for context:
Job openings like these are messing things up for creatives who specialize in one area.
Now everyone looks for video editors who do audio. No more jobs for sound guys.
If you do graphic design, you are now expected to do animation and web design as well. Some even want you to do social media and video.
People who post things like these only want to save a buck. Heck that's why they outsource the jobs in say the Philippines and India. They don't want to pay their local rates.
And some Asian folks like this too because the going rate is higher than local rate here.
But it's literally ruining the livelihood of people in other fields.
I think they're saying that each of those are different professions, which is why the job posting is made by a clown. That being said, there are 15 year olds with TikTok accounts who do all of these things, so it also sounds like someone who doesn't know what a Social Media Manager does and criticizing the job posting.
Ive done all of those things in my current job, and they are unrelated to my actual job description. None of them are particularly hard. Heck, I've installed servers, welded mounting brackets, soldered components, run cabling, designed letterheads, built and maintained VM production servers in AWS, written software, visited clients, delivered goods, done sound design, edited video, written company policy, managed DNS records, and kept all the office plants watered and healthy. Im a technical writer. Some jobs just do be like that.
Sounds like you worked for some fucking stupid companies. Do what you're hired to do, not be an entire IT department, custodian staff and administration. You are the only one losing in that situation.
Or maybe he's worked for some small companies where none of those is a full time job and hiring 27 people to sit around for 97% of their time is not likely to be considered a terribly good business decision.