It really isn't though. Again, this isn't up for debate. There simply aren't enough pixels on these displays to render text properly, without heavy pixalation.
Why would Apple sell high-resolution displays in the first place if what you are claiming were true? What benefit could there possibly be? None.
The fact that every single Apple display on the market, from the iMac, to the Macbook, to the iPhone, to the iPad, to the studio display ALL have high-resolution and high PPI puts this issue to bed.
No, it doesn’t. You only wish it would put it to bed.
The fact is you started this thread with a huge clickbait title that doesn’t represent real life according to other people.
Text is so blurry. Even the desktop wallpapers look terrible. Video is mostly fine, about the same as Windows. But man, the text. Just incredibly blurry and pixelated.
This was your original quote. A lot of people here have said that text is not blurry. In fact this quote above was stuffed with hyperbole.
No one here has said it’s as sharp as a 4K screen, all we’ve said is that it doesn’t look blurry and we have no issues using sub 4K monitors on our various Mac devices.
There are people out there who are perfectionists in sound quality and would probably run screaming if they heard music coming out of your standard home theatre. Does it mean the sound there is bad? No, not at all, it just means it’s not as pure as it could be - which involves money.
Heck 5K Screens put 4K screens to shame - does it mean now that all 4K monitors are fuzzy and should be ignored? I’ve read plenty of posts from coders who will maintain they can ONLY use a 5K Screen to code on because anything less is uncomfortable for them. That‘s fine.
Welcome to personal preference, choice and comfort.
You are not the final arbiter on all this - every individual is. If we’re happy with our screens and we do not find it blurry, then to us, it’s not blurry. We don’t need someone else telling us that we’re wrong - or worse.
I use my 2020 iPad Pro 12.9 and MBP using 2 external monitors equal amounts during the day. I see very little noticeable difference between the iPad Retina display and the HD monitors. I get you don’t like that this is the case, but it is.