I actually agree with this.
Although social media and the meat market that online dating has become should predispose an equal level of pressure between men and women, social dynamics mean the result is different.
In essence as a man, because we are much more individualistic in our social dynamic, beyond an occasional joke there’s no real pressure from other men to look a certain way. Our only pressure comes from appealing to women and if your small or fat then to a large degree the modern online meat markets somewhat just ignore you as a potential mate unless you lower your standards.
Female social dynamics are somewhat different in that even amongst friendship groups women compare and to a degree compete with each other to look and act a certain way in large part because women are much more socially dependent/collectivist (unsure if this is simply a modern thing).
In essence very few men will ever look at their friends muscles and worry about how they look, women do.