[[ Tell me about it....some web pages have stories that are in such small fonts that I wonder who composes them...]]
The answer is easy: young people.
This is why, in other threads, I recommend the 27" "mid-resolution" monitors (1920 x 1080) for older folks whose vision isn't what it used to be.
What these are, are the same resolution as 24" displays normally had as their "native resolution", but "blown up" a bit to expand to a 27" form factor.
The result is a display with larger pixels (.031mm, I believe).
To young people a display with this native resolution looks "grainy".
To us older folks, it looks GREAT.
To anyone younger reading this, just wait thirty more years -- by then you should begin to understand.