Also the glossy mag articles don't get written about the actors who fail or struggle with it. Or drop out of acting with long term weight/diet/eating disorder problems as a result. Survivor bias.
I think an actor successful enough to make that list is likewise far from typical. Maybe some get lucky, but most actors detail years of discipline breaking into the field.
on edit: quick nme listicle on actors gaining losing weight, body modification for roles https://www.nme.com/photos/15-actors-who-underwent-incredibl...