I agree!
Inside, first layer 100% cotton, that means breefs an T-shirt or breefs and buttoned shirt in tropical conditions.
(If lower than 0*C long merino underwear with zipp collar directly on the skin. )
In tropical conditions I wear 100% cotton shorts, breefs, buttoned short sleeve shirt and relatively thin socks with sandals too.
That's my beige clothing for southern France during the summer.
In German summer conditions I use the stuff in the links.
I think we prefer in France, Austria and Germany the 35% polyester 65% cotton mix, because it's here all over the year warmer and dryer than in Sweden, where Fjällräven and Pinewood sell 65% polyester and 35% cotton mix clothing.
I think it depends on the weather what is better, even if it's almost the same.
The armies prefere the mix with more cotton too, because it's more fire resistant.
I think, that's for bushcrafters sitting around pinewood fires relevant too and avoids better getting spark holes in the clothing.
That Austrian stuff currently is produced in pure cotton and polyester cotton mix, because they use polyester-cotton mix in Austria, but pure cotton outside the country in warmer areas.
Very interesting:
The German Army Flecktarn trousers are made in a 20% polyester, 80% cotton mix, underwear T-shirt 100% cotton, light jacket/ shirt are made from 35% polyester and 65% cotton!
So they have universal trousers for warmer and colder weather, but a well sucking T-Shirt and a faster drying overshirt, that they wear outside the trousers ( Feldbluse). The hooded jacket exists in Goretex or 35% polyester and 65% cotton. Or they pull one over the other.