It is impressive how humans can justify bad behavior, because it is easier.
My cousin was enrolled in a gym to improve his health and physical appearance.
He quit after a week. He said it was hard and he can’t follow the workout diets.
I told him:
“It’s a new lifestyle, you will adjust to it eventually. Its for your own good, be patient and consistent.” Seems that was too much to ask. What is more, there are people that tell him he should take pride in his appearance.
It’s sad. We learn slowly? No, we don’t learn at all.
Most people know what they need to do, but don't know enough to actually do it.