The running narrative that is given anytime a guy makes reference to another man’s level of attractiveness of “men don’t know” as if we are unable to accurately determine whether a guy is objectively attractive or not is obviously ridiculous.

Most guys are acutely aware of when a man is physically attractive. Most men can look at a dude like Ryan Gosling or Zac Efron and say yup those guys are genetically blessed.

There are certain universal standards across races and nationalities of what constitutes physical attractiveness, and they are alarmingly consistent.

Austin Butler, George Clooney, Brad Pitt, Henry Cavill - these dudes are almost unanimously agreed upon to be attractive. If beauty were, as you say, some fluid concept devoid of any level of measurability to those outside of the suggested cultural group, these consistencies wouldn’t exist. But they do.

Because women have a herd mentality, and generally don’t care about looks judging by the Pete Davidson and Harry Styles bandwagoners, does not dispute this fact.

Evidence:

https://psycnet.apa.org/record/1995-17400-001