we've had interventions with several friends and family that were about to marry a loser or a cunt
from my experience, they will never listen, and when it comes to marriage/relationships
people are going to do what they WANT to do, and when they are open to advice they simply are looking for someone to agree with them
my wife's oldest sister married a typical loser who became a stay at home dad for 10 YEARS, with just 1 daughter....he was always "working" on some magic the gathering type card game he was creating but never had motivation to go out and find real employment
everyone in the family and around them would quietly nudge each other about how little respect they have for a full grown, able bodied man to just want to stay at home past the couple of years of child rearing
fast forward 15 years, and my wife's sister ended up cheating on her husband with a coworker...she got fed up with his loser attitude and lost all respect for him as a man who stayed at home doing nothing (she is a doctor)
everyone gave her "the talk" about not marrying such a guy, but she didnt listen at the time