There's one fundamental difference between luxury fashion and Big Tech/Big Pharma: the former, historically, has never traded on the image of being "good" or "good for you" the way the latter two did. Look at the rhetoric espoused by the Zuckerbergs or [pick your tech baron here] of this world vs what any given designer, even an era-defining one, has to say about their collections.
Also the reach is very different. Billions of people use Big Pharma products because, well, health, or are on various tech platforms because they're effectively forced to by their jobs (try getting a job without a LinkedIn profile these days), vs the handful of millions who might buy even a bottle of perfume. No surprise people apply a different lens to fashion - it's an easy target thanks to accusations of elitism and things that make people feel insecure, but it's small potatoes compared to the influence the other two have - if anything, fashion has been negatively affected by increasing reliance on tech and the attempt to orient products to smartphone viewing - which is why trying to draw equivalences between them is a mistake.