The problem is that the companies that "went agile" just added some cargo cult practices they learned by some Agile consultant /in addition/ to the old practice

The problem is that the companies that "went agile" just added some cargo cult practices they learned by some Agile consultant /in addition/ to the old practices you describe. You know, I am sure many of those Agile consultants that big companies hire don't even know what the Agile Manifesto is. Agile is not agile.