Yeah, when I first encountered the field I was quite confused. I’d interview developers who had worked for years, but only knew about really weirdly narrow areas of SAP or whatever and definitely couldn’t display the kinds of skills that we usually evaluate for. It’s so different as to feel like a completely different field; we just happen to share titles.
It can also be a stressful one if the tech you're familiar with goes out of style. Lots of re-training involved, years of experience is basically worthless, etc.