David Kibbe has often expressed how contemporary celebrities do not have a star image the way Old Hollywood actors used to have and therefore are not ideal for inspiration. There are many reasons behind this, not just the fact that the studio system days are gone, but he also mentions things like celebrities nowadays constantly receiving brand deals and having to wear certain clothes, as well as designers being controlled by conglomerates to an extend. Basically the business side of fashion interfering with personal style. And in an interesting coincidence, I found an article written by Sofia Coppola in 2019 which talks about the same things (link here). This part was particularly relevant:
These days, many stylists are being paid by the brands they push, and some actresses regularly decide on a dress based on the fee they will receive to wear it. (Not that everyone does this, but it seems to have become the norm.) There are still some women out there with personal style {...} I love when you see an actress who looks like herself, even if her look isn’t perfect. But for the most part, stars are done up in a glamorously generic uniform—a look so professionally executed that real women could never come close to achieving it for a formal event in their lives.
I think we see more and more of this phenomenon nowadays, and less and less of actors who have a unique, trademark style, and their own star image. Sofia mentions Tracee Ellis-Ross, Chloe Sevigny, Kirsten Dunst, and Elle Fanning as examples of modern stars with more personalised styles. There's probably more (the late great Diane Keaton was one, imo) but they are definitely the minority in the current red carpet landscape. I also thought it was interesting for Sofia Coppola to broach this topic because she is known for having a very specific and constant aesthetic for her own personal style (whether this is congruent with her ID or not is a different topic, but I still think it's interesting), and as a director she works with the visual arts, so I loved how her musings coincided with Kibbe's own musings on the same issue.