A standard that measures a quantity that isn't applicable in the real world has little value or relevance. You may well be right that VESA defines resolutions based on horizontal and vertical black and white contrast ratios, but full-color smartphone panels are not used to display horizontal and vertical black and white lines.
Pentile displays do have advantages, and many users will be completely happy with them, but their resolution claims are fake by any legitimate definition.
The resolution claims are real using the only standard, period. Color versus black and white is completely irrelevant.
Yes PenTile screens have disadvantages, especially at these pixel densities, but that has nothing to do with advertised resolution.
Talking about a valid concern using an invalid argument makes the argument lose credibility.
These displays are true qHD resolution as measured by the only standard that exists. That you don't like the way they look and find the measurement method lacking means nothing.