Having an artisian breadmaker tradition helps. Over here in Germany, you can have all kinds of baguette-analogues (and some actual baguettes) virtually anywhere, no magic French dihydrogenmonoxide needed.
Try it for yourself: Baking bread is easy (and many have taken up the process as a hobby during the pandemic). Youtube is a great teacher of these things.
Most croissants are factory-made these days, frozen and then baked off on location, both for supermarkets and bakeries (also many French bakeries). Keuringsdienst van Waarde had a good episode on it, https://www.npo3.nl/keuringsdienst-van-waarde/05-09-2019/KN_...
Try it for yourself: Baking bread is easy (and many have taken up the process as a hobby during the pandemic). Youtube is a great teacher of these things.