This is a non sequitur.

Amenity kits (and PJs) are all about branding.
But they are often cheaply mass-produced off-shore and nowhere near "the real thing" in quality.
Have a look at the many many "luxury" brands that all let their name be used on cheap Chinese-made stuff produced by Formia.

All this being said, I like the 100% cotton PJs given out in LX F, although I am under no illusion that they live up to the quality (or production cost) of the stuff made by Zimmerli in Switzerland.