It is not a problem in many contexts. For instance complementing people in social non-work gatherings. “Wow, you look great in that suit”, or “You are even prettier than I remember”. Or when talking about someones ability to attract attention.

However in the context of an important message from a person, it derails the conversation and kinda just objectifies a person. As if it is more important than what they are saying or contributing.

It basically boils down to this: Do you want to be remembered for being good looking or your contributions to this world? How does it feel to be unsure if you got the job, because of looks? Or if people are listening because of your looks?

I am glad you asked, and I already saw someone gave a great explanation, but wanted to pitch in as well 😊