I didn't say its in general. I stated the flaws and said its not for me whilst I also mentioned that it may be for you and encouraged you to see it with your own eyes to decide for yourself instead of reading about it.
I also jokingly mentioned that there is always a way to avoid natural light which is a true statement. Whether or not its worth it or convenient is another story but there is always a way.
And as you specified, you chose other things to be more important than the light avoidance which is perfectly fine.
No assumption here, its just logical thinking. Any setup can be changed/improved.
And don't know about you, but ergonomics (especially for eyes) is very important to me as we spend tons of hours on our computers and we only have one eyesight so I think we should protect it.