I believe this is true in nuanced ways as expressed by the author. It’s sorta like saying Reformed & Presbyterian is not Evangelical, and yet in some (perhaps many!) cases it totally is, although it should not be.

The corner of Anglicanism I inhabit strives for Re-formed Catholicity, and yet our 1928 prayer is from the Protestant Episcopal Church in the US.

Life in a fallen (already/not yet renewed) world is messy.