I’m not even sure what the point of the article is, given that someone racist enough to believe that rhetoric is probably not going to read it in the first place
Although she didn't say anything about why this was the case, I imagine she'd agree that it's more to do with French workers having better working conditions and aiming for the higher end of the market, which means they use better materials, rather than some innate superiority of the French that makes the uniquely well-suited to tailoring.
Good stuff’s made almost everywhere, but it takes more diligence to find it from other sources.
But this is not necessarily the case, at least not per some clothing companies' claims, see for instance "loom" https://la-mode-a-l-envers.loom.fr/, a French clothing company that produces in Portugal (considerably cheaper labor than France and a developed textile industry) despite their main selling point being quality and durability.
It is perfectly conceivable that a company would try to cut costs on labor, while still attempting to produce high quality things. Perhaps not the most common, but not impossible.
It's usually a very B2B thing (outdated and vague corporate site, if any) but I've purchased very nice blanks from these factories for very good prices by contacting them directly.
There's also a lot of shoe production, but for this there are well known consumer facing stores so people are more aware.
The mass production process and target price point seem much more relevant.
That said, mass production processes are also tailored (ahem) to allow specialization - it's doubtful that one person takes the garment from fabric bolts to completed garment as could happen in a bespoke, individual tailor context (though I'm sure custom garments are generally produced by teams of workers as well!)
So individual workers are likely to be very highly skilled in their individual specialty step and equipment, but may not have the range of production and design skill of a master craftsman.