I disagree with that. Take a look at MacBooks for example - excellent screens that are glossy but not very reflective. Never seen anything better on a laptop.
Have you ever tried working outdoors on a glossy screen? You will wish very fast it was matte.
If by outdoors you mean coffee shops and so on, it's fine. But yeah in the open it is bad, like most cell phones etc. I don't consider that a common use case. If you do field work, get some shade behind/over you. Plenty of reasons for that.
The issue is, like you said, the smearing and contrast, which was a bigger issue with newer, high DPI displays.
That being said, I do believe there are solutions - I have used 4k Matt displays that don't have the aforementioned issue, I think most glossy displays are there for there as a form over function thing.
Glossy displays are still annoyingly reflective and good antiglare coatings are exceedingly easy to damage