Double Barrel,
You don't say which country you are in.
Basically, only the UK - as far as I am aware - really uses QFE.
For one thing, if you were on high ground you won't be able to wind the altimeter down far enough to get it to read QFE! Even in the UK, with Strathaven being 847ft AMSL, we can have this problem. I have even heard that Loganair one time in a deep winter low couldn't even set QNH flying out of Orkney or Shetland one winter, but that is another story!
The Glasgow ATIS, for example - you can listed to it on 0141 887 7449 - specifically gives QNH. There is no mention of QFE. As you say, it is a fixed offset for QFE and is easy to calculate.
The British Microlight Aircraft Association PPL syllabus suggests - but doesn't mandate - the use of QFE on General Skills Tests. Perhaps not a surprise since, as mentioned, it can be impossible to select at times here at Strathaven! So even in the UK it is optional - although you should learn what it is and be able to calculate it for ground exams.