All pixels are a “blur” of R, G, and B subpixels. Their arrangement is what makes a picture look either as designed, or messed up.
For rendering text, on modern OSs you can still pick whichever subpixel arrangement the screen uses to make them look crisper. Can’t do the same with old games that use baked-in sprites for everything.
It gets even worse when the game uses high brightness pixels surrounded by low brightness ones because it expects the bright ones to spill over in some very specific way.
That’s still some Vsauce level reaching that “we don’t actually even see anything”. The tech doesn’t matter when playing and if it looks blurry, then it is blurry.
The tech changes things completely. There are practical examples in other comments.
I said that it doesn’t matter. Only the end result does. There is no game I would play on a CRT simply because it looks worse. It’s not an objective fact but my preference. I don’t care how you are trying achieve the “CRT look” since it looks like shit and I don’t want to see it.