I suppose if you can pass the tests, being a HGV driver can lead to relatively good pay, certainly for non graduates who are unlikely to earn much more than NMW in other jobs. There's a shortage in the industry and many drivers are of an age where they will be thinking of retiring soon.
DP has just started a job where he drives a box van/small lorry (I've never seen it but I think it's the biggest you can drive on a normal, but old style car licence, before they restricted categories) and they're already pestering him to go through his HGV test so he can drive the company's larger vehicles. He might one day, but he's just getting settled into this job for now.
Back to Microsoft Office. When we recruit, we ask for 'familiarity with Microsoft Office' and we do a basic task during interview - admin staff would copy a short hand written note into Word and save it in a certain folder plus enter some figures in a spreadsheet, sum them using the SUM function and save it, while technical staff would maybe add a table with numbers into Word, similar Excel task and for higher grade jobs put together a couple of Powerpoint slides to then present.
These days we would expect everyone to have some experience of MO from previous jobs or school/university, but we do offer training courses for those who want them and we just generally learn on the job and help each other out.
We have a wide range of skill levels. Some people are hopeless while others can enter extremely complex scientific formula into Excel. I'm kind of in the middle - I can do lots of the basics, but not things like pivot tables and macros, mostly because I've never needed to. This thread, or another Mumsnet thread has prompted me to set up keyboard shortcuts for a couple of regularly used symbol/text/number combinations. I am aware of the existence of the concept, I've just never bothered to set them up before but now I can see that they're a very useful timesaver.
But anyway, 'advanced Microsoft Office' is still meaningless as I have plenty of colleagues who look at me open mouthed when I say something like 'you know an IF function can do that for you' when I see them counting through a list manually to see how many times a certain word appears, so they would think IF functions are advanced, where I would put it at a more intermediate level.