Apart from social prestige and low income depending on where they live and work - and these things could be absolutely fixable and I sincerely hope there will be a flip in them - it's the physical labor.
No matter how much prestige this job will ever get, how good the money will pay - it will always end up being taxing on the body. Especially with little technological help provided. I get back pain after 2 hours of mopping the floor, I cannot imagine doing this every day. For years and years and years. I cannot imagine mopping the floor close to retirement age and doing the heavy lifting that is necessary in this job.
Not that physical labor is "wrong". It is the most important form of labor there is and I personally think that these people should be put on pedestals and admired in our society and get the highest pays. Because they are paying with their health and body. But I do think that this taxing aspect would be why, even if it was a socially prestigious job, a lot of people would still opt out.
For real, I am even calling over friends for help to set up a Windows PC or a printer. I have absolutely no idea about technology and computers. I want something easy and mainstream because this way I have an easier time getting support. Two steps are one step too much. I have a lot of strengths but understanding tech is definitely not one of them. And frankly, I neither have the time nor interest to learn anything about it. I have a great respect for linux and I have fond memories of playing a game on my dad's computer, but it's not something that's for me.