Yes, I'm a bit wary of contradicting THE Sophie Fontanel but I do think she's missing something with viewing trainers as just trainers. It's not the great democratiser as she seems to paint imho, there's a whole hierarchy about having the right shoe at the right time.
It's a shame because she could have tied that in nearly to her new classic talk. Streetwear (as in the fashion movement very much tied into US hip-hop culture not things people are actually wearing on the street and these videos attempt to capture, albeit heavily editorialised) presents itself as being the cutting edge of fashion but in the current fashion sphere it's actually the most traditional and very much a continuation of one day you're in the next day you're out fashion as usual which is very consumist focused and not all that artistic, yet coasts on an artistic aesthetic.
No other subculture is as aligned with the old model of what's in what's out, hierarchies of influence and status anxiety quite like streetwear. It's no surprise that the traditional fashion crowd embraced it so eagerly even if their existing clientele had little interest in it (and I'd love to see the bottom line sheets on these course directions), it's predictable and therefore able to be manipulated to their interests (money, mostly). As much as it raised surprised eyebrows to install these streetwear designers into heritage houses it really isn't that surprising, it's very much the same thing just different aesthetics.
Also forgot to mention I really did enjoy her comment on that brands make their reputation in the secondhand market and that you need fickle fat cats at the top to constantly consume and dispose which sort of ties into the above.