
I think this comes down to the part where you say “the world expects a man to change for success”.. the men telling other men they need to change and the women telling other women they can be loved for who they are, are not the same people. Men tell overweight women they should change themselves in order to be loved all the time, and plenty of women love and accept bigger guys for who they are and talk about them the same way they talk about bigger women
Also something I notice a lot among men is an obsession with the gym. For a lot of guys it’s easier to stick to a physical routine than to work on their emotional and mental health, so a lot of them obsessively work out if they’re struggling to date or if they get broken up with because they believe their body type is the only thing holding them back, so it’s just become the norm to tell insecure guys to use the gym as a metaphorical bandaid