Could you quote where he says that? I watched this the other day and I recall him saying that text was very crisp with a hint of color on the edges. He said the previous gen was not up to snuff.
The Quest Pro is a great headset in many ways, but it only offers 10% higher pixel density than the Quest 2 (which was already pretty low).
For comparison: it offers 22.69 PPD. The human eye can distinguish up to 60 PPD.