Never understood the "you need to adjust your eye" comments.
No, she doesn't.
We are all different and prefer different styles.
When a new trend evolves, it may stand out at first, but since huge, wide jeans have been dominating the scene for over 5 years now, I don't think anyone's eye needs a prod.
It has been aaaages since skinny styles were dominant. I would say they are probably less familiar to the eye now than ever before.
I don't wear jeans, but as an observer, I do think that slimmer styles look more balanced on most women, especially the online models who advertise them. Sadly a lot of wider styles are badly made, with hideous proportions and mile long gussets of flapping fabric. They are nothing on the quality and cut of the wider cuts of the 90's, which I guess is what people are going for.
It doesn't work well now because the fabrics and cuts are bizarre, cheap looking and badly fitting.
Same fate happened to dresses.
Only my opinion, so don't shoot me!
Slimmer cut jeans are the most attractive to MY EYE, even though the most dominant silhouette for many, many years now has been crumpled Columbo 
The oversized styles also tend to make everyone look financially challenged. Many of us are - but we don't need to make it worse, lol.
If you are too large to enjoy slimmer fit clothes, that's not the fault of the jeans.