If it ain't broke, don't fix it.
I’d argue it is broke, but people are so used to the design flaw that they have accepted it.
We are still using something which was designed around technical limitations which no longer exist. It would be like still using a 2G flip phone or first gen iMac because it still “works.”
This is a well-known phenomenon regarding redesigns. For example, in the past 10-15 years, a lot of newspapers updated the look of their front pages, which had been the same since the 1970s or even earlier. The advent of digital graphic design allowed for a lot more choices, options and flexibility than had been possible before, and papers were eager to embrace these.
No matter how much better the new design was—clearer, cleaner, more organized—there would always be 1/4-1/3rd of readers who hated it. They “just liked” the old look. They could not justify their view, except on the basis of hidebound adherence to what was familiar.
But within a few months everyone forgets the old look. And if the paper were to change their design again, the same percentage of readers would complain.
Same thing for cereal boxes, soup cans, etc.
This is not to say that all new designs are better. Sometimes new tools and tech generate bad design, too. But that’s not a reason to resist obvious improvements.
So if PCF had existed 50, 100, or 150 years ago, I am sure that some people would have decried the advent of newfangled stuff like corner indices, or clay composites, or edgespots, or (later) automatic card shufflers, or hole cameras, or speedcloth.
I mean, what was wrong with playing with scrimshaw chips? THEY JUST WORKED